Sorry for the inconvenience, Itch really messed things up last year. DM me on Patreon.
Yep that could work.
If you buy a game you should own it. That means you get updates without paying again. A lot of platforms do not respect that. Patreon pushes ongoing payments just to keep access. Itch used to be fine but then they changed things and screwed a lot of people over. I use Nightfall now. It avoids this whole problem and does not force constant spending like the others do.