There would not be any problem if they put their game on steam and update It there. I would gladly pay for it.
steam takes 30% of all sales unless they reach AAA status sales then it drops down to 20, but on itch they take 10% and on patreon they take 5%, yes if it were on steam it would be easier for us but keep in mind they need to pay everyone working on them and only getting 70% of the cash for most isnt enough to pay everyone especially since steam also doesn't advertise porn games very much.
hi i bought seed of chaos on steam last year and got to say the updates are generally 1 month or sometimes 2 depends on how big the update and do not forget all arts in seed of chaos are done by hand drawing not gonna try this game yet since am still on seed of chaos which is an awesome game and changed a lot since version 0.255 which was when i tried the game and liked it went straight to steam and bought it i havent tried this one yet but to do better game than seed of chaos gonna be a great challenge lol