The user has a history of making a post and then, days or hours later, coming back to change the title and link to "azazaz" or "qaqaqa" (just keyboard-rolling by the looks of it). One of those posts must've coincidentally matched up with a domain name that had been registered but wasn't in use. I can see some value in owning a domain with a name like that but that's a whole different set of topics. Mod checks the link, sees that there's nothing behind it and adds a reminder before moving on to the next round of whack-a-mole.