As part of the devs farewell message on their site, they have included malicious code to make each visitor sends 2,000 requests to the dbzer0 servers in an attempt to DDOS and take the instance offline.
The 3000+ was from blahaj alone, and I set it up to go from newest to oldest, and skip accounts that had been unbanned, so no duplicates. I ran it through blahaj first, and then dbzer0, and there were only 500 additional unique bans from from dbzer0 over the last year