Because I play Fortnite (don't judge - I purchased it for myself and my wife when it was back in Alpha. It's a completely different game now.), I get some benefits on Epic, and I've bought perhaps a dozen games. Some of them, like Railgrade, were interesting and fun. Some, like Paranoia, got refunded (although that one was auto-refunded when Nacon was forced to yank it from the stores due to their license actually expiring before they released the game).
Right now, I've got a little over $10 in store credit, so I'm willing to throw it at things that I might otherwise not buy.