Since all of book one is on Steam, I'm taking it as a more stable way to support digi_b. Just throwin that out here.
The way itch has been changing lately, I'm seeing this as a way to make sure the dev actually gets the money. Yeah, Valve (Steam) probably has some type of fees for hosting the game, but I believe it also reaches more people than itch does, so the profit kinda evens out...if not rise (heh ;p).
And well, at this point, I trust Steam 1st, Patreon 2nd...and Paypal (when things don't bug-out) 3rd.