For example, maybe they keep enough to funds for last 6 months of chargebacks and have some special kick-back to bank? Or maybe the game plan is to always open a new merchant account after the first one is closed? Or maybe the bar is so low and they never need to worry to lose their merchant account?
Porn sites, bail bonds, check cashing locations, dating sites, weight loss centers, and dozens of other types of businesses use this category of services which has a very high tolerance of chargebacks.
The sad part is if you get enough chargebacks you can actually bake in a higher transaction cost and not have to pay per-chargeback fees like other normal merchants do.