what happened is the payment processors for Patreon came in and SAID "if this type of content stays on your site, we will NOT continue to work with you." It was not Patreon that is saying it but their payment processors, those that RUN VISA/MASTERCARD/AMEX/DISCOVER/PAYPAL etc. This has happened to many adult sites through out time. Mr. Dots came under fire, Nverijos, Lewd Lab, and SEVERAL others came under fire when the shit hit the fan 3-4 years ago and mr. dots decided to remove DMD from Patreon and place Melody there, 2 months melody work then 1 month DMD work, so even though he pulled it, it made DMD become a quarterly update project. Since Patreon really doesn't look in to the code they don't see the taboo=false/taboo=true to get the change of script.
Patreon is only dictating to those that are publishing and using their payment processors. Steam is not letting Patreon do anything, they have nothing to do here. this is old news though.