You shoud do soe investigaton before replying nonsense.

Someone into identity fraud, would accept high limit exchanges instead of puttng low/medium weekly and per order maximums.

Also, exactly the listngs with very low rates are the ones that have much higher chance to be involved in non legal activities.

But, if you are willing to take the risks for lower rates, start a service yourself, i am sure you will get allot of custoers.
Be prepared to see also many losses, and find out these rates are actually in bad times not enough to cover them