>who should be charging money for it.
I don't see a tip jar as "charging money", though. Not unless the service is behind the paywall. There's thousands of people using this website and it's pretty safe to imagine 99+% did not even click through to the tip jar.
>Would this website still be popular if it was just an online emulator that was capable of playing NFSU2 in the browser, in theory, so long as you uploaded your own legal copy?
1. Given the nature of the emulator crowd, that's not as unexpected an obstacle as you think. Someone running an emulator should be used to procuring a backup.
2. Why do the views/plays matter if there's no monetization? There's no ads that incentivizes web traffic.
>Would many people visit a movie piracy site if it didn't actually have any movies but just had a blank video player that was capable of playing movies?
So, a plex server? Or rather, the APIs used to track movie covers and metadata that Plex pulls from? Seems like the answer is "not as many as a piracy site, but still many"?
But this seems far from my main argument at this point about tip jars. Yes, people have tip jars and may still want to err on the side of caution and make themselves as legally compliant as possi. Fanart, fanfiction, and remixes are technically a gray area with our current copyright system, but the powers that be determined this beneficial advertising (or just plain harmless and not worth fighting in court) and let it go. Clean room decompilations are the only aspect of "modding" that seems to have any particular legal protections, but still a particularly low one.