Hi! You subscribe for a month when you want to get access to a paid release, then you head to our site, login with your Patreon there, and download the latest paid release.
The tiers correspond with the amount of time you have to wait before you get access to the freshly released update. First we release the update for $20 tier, and then each week lower tiers gradually get access:
$20 —> $10 —> $5 —> $2 —> Free (4 weeks in total)
Right now, for example, if you want to play Sonya, Part 3 you need to subcribe for just $5 (or wait 1 week for it to become $2, and two weeks for free release).
You can cancel your subscription at any time, but you can only download paid releases while your subscription is active!