OP fails to mention that wearing their signature is mandatory to participate.

Of course you don't get paid for that.

Stake knows this very well since they have a running signature campaign right here : https://bitcointalk.org/index.php?topic=5092506.0

This is borderline acceptable.

When offering to wear the signature for a comparable rate as in the campaign (half the price of Hero as I am a Sr Member) the answer was "thank you for your interest".

I advise you people to stay clear until they have clear and fair guidelines, which doesn't seem to be the case today.