Yes. It really needs further investigation because it is possible that this is now done in a massive scale because it is a business to them. They also make sure they have accounts available to sell for each rank. I will post more spammers of the same kind if I see them.
I hope you have seen my "adds" above and can understand the implications.
Obviously this is quite hard to follow. Long lists of numbers/links.
But In my brief look, I think I have linked one of your listed users to many different (unlisted) accounts.
Now times that by thousands more.
If you are trying to find more of these farmed accounts as they post, you will be looking for eternity.
From my quick look, I would bet there are many thousand you haven't found yet, for every one you have found. (many are dormant)
If all these farmed accounts could be culled in swathes, would the spam problem be almost solved overnight?
If these swathes of accounts are registering on a limited number of IP, Theymos would know wouldn't he?
If I have reasonably connected multiple accounts in an hour, Theymos must have done the same?
All the mods must be aware that this is where a very large % of the spam originates?
I hope Theymos can find time to comment here.