Well looking around the net about this company is not really reassuring...
Apparently they have 10% to 20% hidden fees. You only get paid after a certain amount, they only pay you once a month, they keep a retainer in case of client refund + an other 25$ for every refund (so if you sell something 2$ they will charge you 25$ + 2$ so 27$)
If you want to use their service, depanding on what you want to do, you should be able to integrate it in your project.