Edwin; There's a difference between providing blog comment guidelines and having to nofollow the outgoing links on your blog because of spam issues. (wiep.net)
Following Symantec's report, Tinder released an update, designed to cut out these types of fraudulent profiles, which their director of comms, Rosette Pambakian, said was «a major technical solution to our current spam issue.» (globaldatinginsights.com)
Admittedly, opening up DMs like this, coupled with the potential spam issues, makes this move look extremely odd. (slaw.ca)