itch.io

It is. They base it the same way there patreon works. So just like subbin to there patreon you pay a fee every month.

As long as Lags doesnt make a new page for the game youll have free updates. I purchased the game 200+ days ago on this page and still have access to download it. But if a new page is made and a new price is asked then youll have to buy the newest game on that page