Leafo's response on Discord :
When you opt your account into our payouts system, you are asking us to take on the liability of selling your work on all of our merchant accounts, payment processing services, etc. As described in the email, there are many factors that contribute to the risk associated with running an account for someone. Our goal is to enable the most creators to use our service as possible. However, when a seller knowingly shares content that may pose potential issues, it becomes unfair to the rest of the creators we serve.
I try to avoid mentioning revenue share in these types of discussions, as we aren't asking people to set their rev share to anything specific to get access. But, the arrangement I described above can be especially disheartening when many of these sellers also set their rev share to 0. I'm fairly sure the devs are very much aware of the risks and are purely taking advantage of the situation. It's a lose-lose situation for itch.io. Unfortunately that leaves us in a tricky position and we sometimes need to make the difficult decision about what accounts are eligible for certain features.
Hope that gives you some clarity about our process.