You pay once to get the Itch.io version, our most stable public release. You don’t need to pay again, and you’ll receive all future updates.
Itch.io builds are typically a few versions behind Patreon’s developer builds, which are still in active testing.
In short, Itch.io has the most up-to-date publicly available version. Patreon builds are experimental and not yet officially released.
On dev terms:
Itch.io is the main branch, fully merged and tested.
Patreon builds are the dev branch, where we’re still pushing commits and fixing merge conflicts.