I would like an official response to this question as well.
There are cases that are clearly a breach of the Terms of Service and Privacy Policy and/or Marketplace Asset EULA such as creating new content using art assets purchased through the marketplace and distributing that content on a scalable model without properly licensing the assets used to create the content.
The question here is whether using Marketplace Assets to stream and/or run paid game sessions is a breach of the Terms of Service and Privacy Policy and/or Marketplace Asset EULA.
One case in this category is the many paid games that are run using published modules such as Curse of Strahd and Dragon Heist. The prevalence of such games seems to indicate that using marketplace content to run paid game sessions is permissible.
Another case is using marketplace tile-sets to build content for paid game sessions. If using published modules purchased through the marketplace to run paid game sessions is permissible, it seems logical that using tile-sets purchased through the marketplace to run paid game sessions is permissible.
Unfortunately, the current Terms of Service and Privacy Policy and Marketplace Asset EULA are not clear regarding the use of marketplace content for streaming or running paid game sessions and make no specific mention of streaming or paid game sessions.
I've excerpted what seem to be the most pertinent sections from both documents.
Terms of Service and Privacy Policy 7.3
Who owns the IP of the images and sounds that I include in my campaigns via the Art Library, Marketplace, and Jukebox tools?
The tokens, map tiles, sounds, and other art assets that you include in your campaigns via the Art Library, Marketplace, and Jukebox tools are the intellectual property of the providers of the assets. For more information on the assets included in Roll20, and their providers, see the Acknowledgements page and/or the individual asset page on the Marketplace. We have licensed these assets to allow you to use them to create non-commercial works in a personal setting. If you wish to re-distribute any campaigns you create on Roll20 that include assets from any of these providers outside of this intended purpose or outside of the Roll20 service, you must contact the provider(s) to license them directly. Orr Group is not responsible for your use of the assets in any way that violates the rights of the providers. In addition, assets included from the Roll20 Marketplace are subject to the additional terms in the Marketplace End User Licese Agreement (EULA).
Marketplace Asset EULA 3.5
Unless you have been specifically permitted to do so in a separate agreement with Roll20 and except as permitted under the Roll20-EULA or a Provider License (for free Assets only), you agree that you will not reproduce, duplicate, copy, sell, trade or resell any Asset that you have acquired from the Marketplace for any purpose.
Marketplace Asset EULA 3.8
You agree that Roll20 and/or third parties own all right, title and interest in and to the Marketplace and the Assets available through the Marketplace, including without limitation all applicable Intellectual Property Rights in the Assets. "Intellectual Property Rights" means any and all intellectual property rights wherever in the world and whenever arising (and including any application), including patent laws, copyright, trade secrets, know-how, confidential information, business names and domain names, computer programs, trademark laws, service marks, trade names, utility models, design rights, semi-conductor topography rights, database rights, goodwill or rights to sue for passing off, and any and all other proprietary rights worldwide. You agree that you will not, and will not allow any third party to,
- copy, sell, license, distribute, transfer, modify, adapt, translate, prepare derivative works from, decompile, reverse engineer, disassemble or otherwise attempt to derive source code from the Assets, unless otherwise permitted,
- take any action to circumvent or defeat the security or content usage rules provided, deployed or enforced by any functionality (including without limitation digital rights management or forward-lock functionality) in the Assets,
- use the Assets to access, copy, transfer, transcode or retransmit content in violation of any law or third party rights, or
- remove, obscure, or alter Roll20's or any third party's copyright notices, watermarks, trademarks, or other proprietary rights notices affixed to or contained within the Assets.
If using Marketplace Assets to stream and/or run paid game sessions is permitted, it would be best for everyone for that to be clear in the relevant legal documents. Additionally, streaming and paid game sessions both have enough potential to generate legal issues that I was surprised neither was ever mentioned in the Terms of Service and Privacy Policy.
If these types of use are not permitted, a large number of Roll20 users are making impermissible use of marketplace content.