Look I am in this business for so long .third party merchant account is a disaster The truth is they can't Handle more than 1% chargeback rate even if they try to mix it it won't work cause Infront of every one Charge back he needs to add 100 transactions so what ever volumes they have they can't support your back if you scale so they suspend any account above or equal 1% also put in mind that there is no adult or nutra business is doing less than 3% so how those big adult business guys are working with third party with no problem the secret is the third party is doing a direct connection between them and the acquirers . I have already merchant accounts directly with 3 acquirers but I just wanted to know if someone know more so we can check them out .also note that mixing the transactions to lower the chargebacks doesn't work cause putting 100 transactions against every chargeback is semi impossible process imagine you are selling product for 50$ and you have 1000 transaction with 50k$ revenue with 3% CB rate so you have 30 chargebacks to get the CB under 1% again you need to add 3000 transaction with zero Chargeback so how working directly with the acquirer can keep you processing with 3% CB this is a long process that needs a lot explanation and it is not for some one on limited budget.