You should focus on the actual enemy (VISA, Mastercard and who made them take that decision)
What Steam and Itch are doing good is gathering players in the same place, in that way we can talk share and build a strong community.
Going elsewhere will just make the community shatter and we'll become more distant.
How many time does it take to gather the same numbers of players elsewhere? A significant amount.
They don't care where we go, in fact, considered who those fanatics are, they would probably want to demonize games in general.
Shattering will make 'em buy more time to do that, it's much better to gather and use our voice... don't make them grant a double victory