Depending which casino affiliate program you sent those players to you could switch to revenue and still keep them players, if you could continue to send a high volume of players then i’m sure you could make that happen with a bit of negotiating, it worked for me when i had a large volume of players on my first 2 months on CPA, i was planning to switch anyway but i managed to keep my existing player base. CPA sucks and i knew that but i needed guranteed cash at the time.