You really have to be very careful this case for leads reversal and scrubbing. Most of these offers are from the same advertiser. I suggest that you hold before you scale. Make sure all payments are in without issue before scaling. During this period of waiting, your AM is going to push you to drive more traffic and scale. He/She will be exceptionally positive about the quality of your traffic, etc. Don't listen to these bullshit. Stay according to plan and scale only when your money is safely in the pocket. AM don't have any power at all on leads reversal. If advertiser don't pay, they won't pay since MB only takes a portion of prepayment while the rest are billed 30 days after to advertiser.
This is what happen to Peerfly when they close down. The advertisers simply refuses the clear the outstanding invoices so the CPA network has zero cash on hand to pay outstanding publisher. Peerfly is one of the pioneer in the CPA industry and if they can get screw up by advertisers, same applies to Maxbounty and any other network.
Do be very careful when you work with paid traffic and choose to partner only with reputable ones.