[elcomet]

I don't understand the difference with any other website.

What prevents the scammers to post links to a website containing crypto miners, or any malware ?

[themacguffinman → elcomet]

It doesn't stop scammers in their tracks, it just makes it harder. With dedicated scam websites, there is an actual cost to procuring new site addresses to evade domain blacklists, and they can't piggyback off jsfiddle's domain credibility.