Yeah, but they’re going to stop supporting organised play too (the license to the universe it’s set in expired), i.e. a tournament scene. Which is more than prize support, it’s also curating a ban list etc to keep the game balanced.
With no new cards being released, people stop playing. So local groups drop below the critical mass they need to keep going, which means fan run tournaments get lower and lower numbers and eventually it burns out. It’s happened before with other card games.