By good advertisers I mean good posters in general, not "good salesmen". Some of the banned people with 5+ years of experience had a better knowledge of Bitcoin than you do so calm down.
If they are good posters, then they can keep posting. A ban on your sig does nothing to stop that.
You're specifically arguing that you/they will be 'unemployable' because of being caught plagarizing - so my point stands. If transparency on an earlier ban makes you unable to get into sig campaigns well that's probably a good thing. There should be disincentives.
Reading back on your posts in this thread, the entire language and expectation you have around how you should be able to make money off signatures, being a good advertiser, needing to be employable and so on is entirely indicative of the problem with spam in this forum.
If these people are good posters first, and have a sig blog as a secondary point, then they will keep posting regardless of any sig bans.