IANAL, nor do I represent Roll20 on this, but the situation you describe almost certainly falls under Fair Use, if not Intended Use. No one has ever complained about someone running Curse of Strahd for a Pay for Play game., for example. You are not redistributing or publishing the assets for others to use. You were given explicit permission to use these in games you run. Nothing was ever stipulated about "only running them for friends". If any of you are curious about what you can and can't do with the Marketplace assets, this is spelled out in excruciating detail in the Marektplace End User License agreement, available here (and linked from the bottom of every item in the marketplace.) The original question is answered in section 3.8 (excerpted from here): 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, You can of course alter them to your heart's content in your own game.