Colossus Media, LLC v. Adalytics Research, LLC

District Court, D. Maryland·Decided September 16, 2026·No. 8:24-cv-01402·Unknown

Opinion

IN THE UNITED STATES DISTRICT COURT FOR THE DISTRICT OF MARYLAND

: COLOSSUS MEDIA, LLC :

v. : Civil Action No. DKC 24-1402

: ADALYTICS RESEARCH, LLC :

MEMORANDUM OPINION Presently pending and ready for resolution in this false advertising and defamation case is the motion to quash or for protective order filed by Plaintiff Colossus Media, LLC (“Colossus” or “Plaintiff”) regarding subpoenas issued to two third parties: (1) BidSwitch, Inc. (“BidSwitch”); and (2) Basis Global Technology, Inc. (“Basis”) (collectively, “Third Parties”). (ECF No. 59). The issues have been briefed, and the court now rules, no hearing being deemed necessary. Local Rule 105.6. For the following reasons, the motion will be denied. I. Background A. Factual Background The facts giving rise to this dispute are set forth in previous opinions. (ECF Nos. 24; 44). In short, Colossus, a “sell- side platform (“SSP”),” has sued Defendant Adalytics Research, LLC (“Adalytics” or “Defendant”), a company that “purports to conduct advertising analytics,” relating to a May 2024 blog post published by Adalytics. (ECF No. 9 ¶¶ 1, 16, 23). Colossus’s parent company Direct Digital Holdings, Inc. (“DRCT”) is not a party to the litigation. According to the amended complaint, the at-issue “post portrayed [Colossus] as mis-declaring user IDs in its bid requests

for the purpose of selling ad space at higher prices to ad buyers seeking to serve advertisements to a targeted audience.” (Id. ¶ 24). Colossus states that it “utilizes proprietary technology to automate the sale of ad inventory between advertisers and agencies, a process which involves matching up a cookie-based user ID to a demand side platform (“DSP”) user ID to make sure that ads are displayed to their respective target audiences.” (ECF No. 59-1, at 6). According to Colossus, third-party BidSwitch is “an intermediary that helps connect SSPs,” including Colossus itself, “with DSPs”; “Colossus handles at least 12 billion . . . ad requests on any given day, many of them flowing through” BidSwitch. (Id. at 6). Also as part of its operations, Colossus uses the

programming of third-party Basis. Colossus states that each request it executes through Basis’s programming takes “less than half a second.” (Id.). B. Procedural Background Discovery began in early April this year. At the end of the month, Adalytics served its first set of requests for production on Colossus. (ECF No. 59-2). Beginning in mid-May, Adalytics 2 served on each of the Third Parties a subpoena to produce documents. (ECF Nos. 59-3; 59-4). Colossus challenged both subpoenas in the United States District Court for the District of

Columbia on June 17, 2026. Pursuant to Fed.R.Civ.P. 45 (“Rule 45”), that court transferred the motion to this court, after obtaining consent from the Third Parties.1 By August 4, 2026, all pertinent motion papers were entered on this docket. (See ECF Nos. 58-63). The day before, the parties’ joint motion to extend deadlines was granted. (ECF No. 57). The Third Parties have not challenged the subpoenas. C. The Basis Subpoena Adalytics’ document subpoena to Basis contains five requests, covering November 1, 2023, to December 31, 2024, commanding production of: 1) All communications between You and Colossus relating to mismatched Advertising IDs, including, but not limited to, any business issues or concerns arising from such mismatches.

2) All communications between You and DRCT relating to mismatched Advertising IDs, including, but not limited to, any

1 Pursuant to Rule 45(f), if the court where compliance is required did not issue the subpoena, it may transfer the motion to the issuing court. After deciding the motion, the issuing court may then transfer the order to the court where the motion was made to enforce its decision. 3 business issues or concerns arising from such mismatches.

3) Any aggregation queries of log-level data concerning inconsistencies between user IDs declared by Colossus or DRCT in bid requests, on the one hand, and actual user IDs mapped by Basis using browser cookie identifiers, on the other.

4) All communications between You and Colossus relating to any irregularities or anomalies in Colossus or DRCT publishing advertising information, including, but not limited to, communications regarding Colossus’s compliance or non-compliance with Basis Rules, DRCT’s compliance or non-compliance with Basis Rules, or Non- Compliant Inventory.

5) All communications between You and DRCT relating to any irregularities or anomalies in Colossus or DRCT publishing advertising information, including, but not limited to, communications regarding Colossus’s compliance or non-compliance with Basis Rules, DRCT’s compliance or non-compliance with Basis Rules, or Non- Compliant Inventory.

(ECF No. 59-3, at 11–12). D. The BidSwitch Subpoena Adalytics’ document subpoena to BidSwitch contains six document requests for materials between May 5, 2024, and August 31, 2024, unless otherwise indicated: 1) Provide the BidSwitch Terms of Supply Partners with Colossus and/or DRCT in effect on May 1, 2024.

2) All communications between You and Colossus between May 1, 2024 and August 4 31, 2024 relating to Colossus’s compliance or non-compliance with BidSwitch Rules, including, but not limited to, communications regarding Colossus’s supply quality or Non-Compliant Inventory, including mismatches in the “buyer user ID” or “user ID” field of an ad auction bid request.

3) All communications between You and DRCT between May 1, 2024 and August 31, 2024 relating to Colossus’s compliance or non- compliance with BidSwitch Rules, including, but not limited to, communications regarding Colossus’s supply quality or Non-Compliant Inventory, including mismatches in the “buyer user ID” or “user ID” field of an ad auction bid request

4) All communications between You and any BidSwitch customers between May 1, 2024 and August 31, 2024 regarding Colossus’s compliance or non-compliance with BidSwitch Rules, including, but not limited to, communications regarding Colossus’s supply quality or Non-Compliant Inventory, including mismatches in the “buyer user ID” or “user ID” field of an ad auction bid request.

5) All communications between You and any BidSwitch customers between September 30, 2023 and August 31, 2024 regarding a request to pause or restrict bid requests submitted by Colossus.

6) All documents relating to the Report, including communications between You and any third-party regarding the Report between May 1, 2024 and August 31, 2024.

(ECF No. 59-4, at 12–13). 5 C. The Pending Motion Colossus contends that the subpoenas (1) place an undue burden on the non-parties; (2) seek irrelevant information; and (3) seek confidential commercially sensitive information. (See ECF No. 59-

1, at 10, 12, 15). It moves either to quash the subpoenas, or for the entry of a protective order.2 Also, due to the undue burden Adalytics has allegedly saddled upon the Third Parties, Colossus asks the court to “award appropriate sanctions” pursuant to Rule 45(d)(1). (Id. at 12). Overall, Colossus contends that the subpoenas are unjustified and were served for the singular reason of “further sow[ing] distrust between Colossus and its partners in the industry and to cause additional reputational harm to Colossus.” (Id. at 6). II. Standard of Review Under Rule 26, in certain circumstances, a court must limit the frequency or extent of otherwise allowable discovery,

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