They don't sell much these days, but no need to worry about getting paid. Just link them to an existing ccbill account and get paid by ccbill. They ran as traditional ccbill style site before offering their own tracking.
Sign-up via CCBill is still there:
Everest Cash CCBill signup form
Now login at the Everestcash site and hit "Personal info". You can enter your CCBill id for the program there. It'll be tied to your everestcash username and you should get paid by CCBill.