GMBill Clients tend to use GMBill.com as their primary biller, and CCBill as their backup biller. Typically at least 90% of sales will be processed through GMBill.
Therefore, Affiliates should merge the links provided by GMB and CCB, so cookies are set for customers for both billers.
That way, regardless of which biller the customer joins by, the Affiliate will be credited for the sale.
Using only the GMB link will mean the Affiliate misses out on some sales. Using only the CCB link will mean the Affiliate will miss out on many sales!
We have a simple tool to merge GMB and CCB links, but this is a use-at-your-own-risk deal: we strongly encourage you to make a test join via both billers after creating the merged link.