It's good that they do have restrictions but I think it's much better if they filtered out real and fake gambling sites, but I think it's really hard work to spot which sites are fake or not since some legitimate gambling sites can turn into scam and there's no way we can predict or to know that.
I agree with you mate determining which site is a scam or real one is definitely hard. Twitch really made a great decision by imposing a restrictions on gambling-related links however it is easy to impose restriction but how about the filtering of links which one is the real one and which one is fake. I mean every social media sites we have today allowing streamers to exposed gambling sites in their pages but one or many of the links were scam and it is alarming because a lot of people got victim on this scam sites.