I can't check every individual on the list, but I'm sure most became active forum users
Cute. But wrong. I checked the first 10, and 9 of them have 0 posts (AKA Nuked). One of them has 580 Activity now, and 0 Merit because bounty spam isn't worth Merit.
and those who were nuked moved on to open new accounts. Nothing was solved
Hundreds of farmed account were Nuked and their IP-addresses got evil point for it. Of course there will always be spammers, but every account that gets banned is one spammer less. The fact that there's much less spam now than we had 4 years ago confirms it's working.