Though it's been three months, but I'll put my 5 cents.
The support from Plimus is something some do not answer, the answer, but some garbage.
They are afraid of chargebacks as fire is the most moronic reason from the buyer rolls. For example, "the product does not meet the description" a ride. This is considering the fact that there is a trial version of a product that commercial is no different, except for the work time. And it was not the chargeback, and refund through their internal system with the threat of chargebacks.
They say that penalizing the seller, only if the number of chargebacks from the total number of transactions exceeds the threshold of 0.4%. And this is only 1 of 250 chargeback on a successful transaction.
Support and chargeback are two of the biggest problems with Plimus. Other than that, everything works as it should.