I personally think it's a bit extreme. If the manager feels the members he hired are not “productive”, he could just remove them or make a reshuffle without raising dust.

If not mentioning/recommending the service one is having in their signature space is an issue and can get one booted out of the campaign, then how about constructive criticism of the service? Let's say the service I am advertising is having some issues, an open scam accusation etc. and I try to say something about it. Isn't that an automatic disqualification as well in that context??
Aren't we going to see cases where members fear to make comments about the service they are advertising because the fear has been instilled in them?

The next thing we shall see is all members recommending the service they are advertising in every related thread they come across for fear of being thrown out. Worse still, avoiding posting in competitors threads because boss might not be happy.