Technically it's not fair, it's the same thing for campaign managers who require to use username or ID from the account they sign on the site they promoted. Also asking to write a review on ANN thread.
The first one is, they "working for free" to get organic traffic and the second one is, they "working for free" get review.
looking around it seems like apart(though I might have missed someone) from Jokerbet.biz, Hhampuz is one of the camapaign managers that require his applicants to wear signature and avatar when applying. though I am not sure if he is strictly enforcing it, I have not been in one his campaigns in a while. anyway, I don't really see any issue with it.
here's the most recent campaigns he has where he requires his applicants to wear signature and avatar
Yeah maybe @OP of that thread was inspired by Hhampuz, hence they use that rule too.
I have participated in few campaigns managed by Hhampuz and he still accept me even I didn't wear both signature and avatar when/before applying, although I can't answer whether it's increase the chance or not to get accepted.
I really don’t see this as a Meta issue.
True, this thread should be moved to Service Discussion board.