There are other types of payment except paypal. I can think of Skrill.
I believe you lack the knowledge of how patreon and paypal work.
Paypal has not banned Boomatica. Paypal threatens to ban Patreon from their services if Boomatica and artists like him are allowed to continue making games like RIC.
Paypal is 80% of Patreons (the company) income. That is more than 80 million dollars a month. Paypal can risk losing patreon. but patreon cannot risk loosing paypal (80 million dollars a month).
Once tipee makes 2 digit million a month from paypal transfers, paypal will ask tipee to remove unwanted content as well.
Paypal has killed and maimed erotica sites for the last decade. With exactly the same process. Once your erotica site makes a lionshare of their money with paypal. Incest, beastiality, age play, BDSM, rape , lolita and others have to vanish or paypal will cut services forever.
Therefore Patreon is banning creators who make that content, to secure cooperation with paypal. Because paypal does not just ban single creators. They ban entire companies.
If Boomatica would have continued making RIC, he would have been banned from patreon forever, because patreon can loose 1k a month but not 80 million.