"Why the Blurt people spam HIVE they would have to tell us."

Most of them came from Hive, and left because they were taxed at 100% of their earnings. Because this is possible on Hive, and they know it causes people to leave - as Yintercept just posted he is leaving Hive because of that today - they advertise the DV free Blurt here.

That is my understanding from talking to them. Also, they're mad at being taxed excessively, so they are striking back with spam (the spammers) because they can't effectively tax whales back.