Can't upvote in General for some reason but this should happen.

Is it really, though? Most PC games aren't distributed with the expectation of end-user modification any more than Super Metroid or Streets of Rage.

In any case, it's not Twitch's job to be the judge and jury on whether the many, many people using emulation are doing so legally or not. They can't, actually. Which is why they don't.

Also note that there's already a randomizer tag, which in the vast majority of cases is a romhack, so it's not like there's zero precedent.

That's an interesting question and I don't think there are answers that satisfy everyone. It might have to be a case-by-case basis.

Like for example, I would suggest that NES/FC/FDS are all rolled into the same category because there was so much crossover in their libraries and the differences between them aren't so significant that you really GAIN a whole lot from the user's perspective by splitting them up. That might be wrong, but I think it would be annoying to have to check three different categories for "games on Nintendo's 8-bit home console"; there's no reason the decision can't be revisited in the future.

Conversely, 32x games should probably not be rolled into the Genesis/MD category (they kinda have a different flavour to them), but Sega CD games WOULD (because outside of having Red Book audio and a lot more space for data, it doesn't really change the capabilities of the system). Likewise for PC Engine/TurboGrafx and their CD libraries. And, to some extent, that was the last generation where it actually mattered, so there's not TOO many edge cases to consider anyway.

Rigour and attention to accuracy is only good until it starts getting in the way of users finding things they want. There are ways around this (for example, the NES/FC category might actually CONTAIN the FDS category, so one could drill down if they have an interest in doing so while still making sure that the JP version of Zelda is still represented alongside its overseas version), but I think anything is better than what we have now.

The crazy thing is they're already hijacking the RTMP stream to inject the ads, so it's not like they don't have something to normalise against.

I want a "Favourite" or star or upvote for clips I like so I can find them again.

I get where you're coming from, but isn't that basically the same as taking a commission and then using the art you were commissioned to make for other things without regard to the spirit (or even letter, depending on the contract) of the transaction? It seems kind of skeevy to covet the emotes of someone you have no intention of supporting...

The salt in the comments convinces me it's a good idea.