This is nice project without any doubt but it is not entirely new to the cryptocoin community.
What are the features your payment gateway has that is different from that of coinpayment.net and the rest of them ?
Your method of adding new token to your platform appears to be too strict, you need to add as many token whether it is mutually beneficial or not since you are new in the field; you shall win over the community of any token you add.
I feel your business shall be safer if you can introduce a minimal fees compare to zero fees because most clients shall abandon your website once you introduced fees because people like and enjoy free stuffs.
Good luck.