Moving to the Disney Rewards Forum.
I'm not sure that too many people like this program, so you may not get a lot of responses. I've been doing it throughout the year with no problems. Sometimes the cashback percentages are better than others. But I haven't limited my shopping to ebay only.
Shoebuy was 20% back a couple of weeks ago. eBay has been at 8% for several weeks now. I expect it to improve with the holiday shopping season coming up. I just check it to see what kind of cashback they're offering before I make any online purchases and then act accordingly.