I have been on SpaFinder for a while, and I love it. I have a neighbor who got several SpaFinder GCs through his company (incentive gifts) and he asked if I took them. So I contacted them, filled out an application and was approved. Since then I have gotten several clients who never would have found me otherwise. They do take a good sized chunk of the GC face value, but I still have found it worth it. (For my own GCs, I go through SpaBoom.)
I'm looking forward to seeing if I get any more new clients since SpaFinder bought SpaWish. I see SpaWish gift cards for sale all over the place, and was happy to discover that if I am already part of SpaFinder I can also be part of SpaWish. Now I'm listed on both.