Names are OK, full contact info, including URLs, is not.
Allowed: "I bought some peptides from Receptor Chem and they were good"
No contact info, no foul.
Allowed: "Man, those guys over at PSL sure don't English very well"
No contact info, not even a name (but everyone knows what PSL means), no foul.
Allowed: "I get my jollies at
https://www.onlyfans.com/Cylon357/IsOneSexyMFer"
Full URL, BUT not a source site (though perhaps questionable material all the same).
Not allowed: Ah psyche! Not going there.
Admins, correct me if I have misspoke, but I think those are the rules (illustrated in a very basic, and perhaps stomach turning, manner)