Taking delegations back from inactive accounts and abusive ones is a great step in the right direction.

I hope they're also working on ways to stop spam accounts signing up in the first place.

Looking at the abusive accounts that have been found there are many blocks of 10 which I would think would be pretty easy to detect at the sign up stage.

For example:
address100
address101
address102
address103
address104
address105
address106
address107
address108
address109

It's great to see that steps are being made in these areas though. 😊