It seems as though you are exaggerating. As far as reputation is concerned, it seems as though
irfan_pak10 has no valid allegations in his trust history to suggest he is a scammer. If he is managing a bounty and has no control over the COMBO tokens (as bounty managers usually have to wait for the owners of projects to release bounties) therefore you calling him a scammer is somewhat harsh.
First of all, who was supposed to distribute tokens, irfan_pak10 or Combo team?
Most of the times, it's the project team and same here in the case of Combo too. Irfan_pak10 has nothing to do with the bounty distribution. He just has shared the promise he got from the team. That's how it works in most cases.
I request OP to check out whether the bounty rewards is in escrow or not + whether the gas fee for the distribution has been shared by team or not, before participating. I had cases like this. Team shared me the rewards but haven't sent me the gas fee which later caused a huge chaos at the end. I was waiting for team to send the gas fee, participants were asking questions everyday lol.
The OP is aware of that, he knows the bounty manager has no control over when the tokens for distribution will be released.
If these campaigns are plagued with non payment as a couple of the previous posters have alluded to, then why do CM take on the job *without* securing funds to pay the campaign participants?
I think what normally happens is for payment to be made from the actual tokens when they are released. The days of bounty managers taking payments in advance using Bitcoin seem a long time ago.