Taking your business elsewhere is just delaying it. Itch was just the next step on their warpath of censorship. There won't be anything to stop the processors from attacking your "next" platform, or the "next" platform, or the "next" platform, or the "next" platform...
They have already attacked (and won) against Epic, Steam, Patreon, OnlyFans, PornHub, etc... and the list will continue to grow if the cancerous reason for this trend is not removed. It is the processors dictating what can and cannot be purchased.