Even he did pay half of all participants, it's still fall to scam if he didn't want to pay the participants when they're eligible.
It is still their campaign and they have the right to decide who is eligible and who is not. So neither you nor I can say who is eligible.
The campaign is confused and badly set up, it is to be expected that it will cause a lot of controversy. It's simple, if you're not ready to take risks with this kind of campaign, if you don't like the management, don't apply.
The eligibility of any participants will be dependable on the rules and regulations the management presented to the signature thread, the manager can't wake up just a sudden and introduced it's rules without making it visible to the participants that's under his care, he/she needs to pay every participants that completed it weekly post .
Nobody is dragging his campaign with him, and I know quite well that if they will be a resolution that should be done after he has clear first payment...selecting few participants and credit them is unethical and some of them he refused to pay doesn't know their offence, many persons has commenting on the signature thread and its yet to respond including other thread established because of signature and is yet to clarify both the participants and entire forum users.