Earlier quoted context omitted.
According to the article, the stores were running malicious javascript which grabs people's credit card info. This obviously means they are vulnerable in some kind of way, but I fail to see how this is reasonably likely to be exploited. Even if it was, you also have to consider the benefit of warning the users. I am not a security expert though, and I might be missing out on something.
The responsibility of GitLab and GitHub is not to investigate if those 1000 sites are indeed running malware and how dangerous the malwares on these sites are, and who could be harmed by these malwares. The responsibility of GitLab and GitHub is also not to judge if it's "more important" to protect the site owners' businesses or the people going to the sites. If some sites are running malware, the site owners are res…
Nope. DCMA is about copyright, and we have not gotten to the point where someones URL is copyrighted.