I don't know about Combo bounty, I cant actually remember when last i visited the bounty section of this forum, but i sure was once a bounty hunter, and back then, i have participated on few bounty campaigns that was managed by irfan_pak10. He is a reputable campaign manager, one i really trusted and still trust maybe, but you just gotta understand that some times, things like not getting paid after work does happen, and it is not always the fault of the bounty manager.

Till today, i still remember a bounty campaign i participated in, the company is Standard.io, the campaign was managed by irfan_pak10, this is several years ago, irfan_pak10 promised that the participants of this campaign will be paid by the company themselves, the company also acknowledged that they will pay the campaign participants, but till today, there was no payment, its been over 4 or 5 years now.

So as a bounty hunter, understand that there will some times be instances where your work wont be paid for, most especially, if the payment is not directly in the hands of the bounty manager, this is why you must participate in such bounty campaigns at your own risk.