I hear ya.
But personally I think that it would be a thing that would only be necessary for a few months because one, or a combination, of the following would happen:
1) NZG's bone head move puts them out of business.
2) Most of the advertises flee NZG to other pastures where they can continue to drum up business (potentially then causing the above), but in the meantime they get some breathing room to actually properly implement their new advertising.
3) NZG gets wise to what is happening, but is always behind the curve because they have to keep monitoring SF, then they have to investigate which likely NZG member is circumventing their money grab, then they have to action banning that user account, only for another to crop up ... and they have to do the whole dance again and again, tying up their resources until it becomes too much of a headache to police. Added bonus occasionally they'll end up fucking it up, banning a legit member, who will then tie up more of their resources in complaints, refunds and spreading words about them being not great.
4) NZG sees what is happening, understands that there is no real way to cost effectively combat it, and basically just gives up the scheme, and goes back to the way that they were operating before their 'trial'.
I'm not even saying that we even actually enact the idea.
The fact that they are monitoring this thread (clearly) will mean that now just by seeing my idea a little niggle will have formed in the back of their heads and they'll be constantly trying to figure out if it is actually happening or not, because it just might be ... that will also tie up their resources.
Sometimes messing with the adversary's mind is even better than actually doing anything to them.