A similar case posted over an hour ago in scam accusation board.
They might be a gang who's sending phishing links to other users. Both the accused users have similarities between them.
Instead of an organized gang, they might just be all victims of clicking on the same phishing link. And when they do get hacked, they are able to take over the hacked accounts and basically send more PMs from their accounts. Think of it as an ever expanding network of infected accounts, also trying to infect other accounts.
That should be the case, leading to more and more people being victims and sending out these phishing links without their consent.
I've seen 2 similar cases in scam accusations today, I don't think it's a coincidence. I doubt that anything bad will happen to you just by clicking on the link and checking it out before exiting it, but it's best to run some antiviral scans still just to be sure.