[shaokind]

As someone pointed out (and I should’ve mentioned earlier in the article): yes, Valve have a system for registering servers with Steam IDs.

But there’s two problems: they haven’t done any enforcement action ever, and server owners have access to massive amounts of burner accounts.

edit: I've now updated the article to mention that in the main body of the text.

[Aeolun]

If they start banning everyone that does it even those operators will rapidly run out of burner accounts. Can’t keep justifying $30 for every CS purchase if it’s going to be banned a day later.

[shaokind]

Agreed. With that being said, the price isn't $30 for the spam creators, they're buying shady accounts for far cheaper.