The problem was that many resellers bought 66 brand at a much lower rate than the 76 brand. I tried to sell the card as a 76 brand gift card to Cardpool to get the 92% rate. Cardpool accepted my gift cards and confirmed I would be paid 92%.
Just to follow up and because 76 brand gift cards went on sale yesterday on eBay I wanted to let everyone know that the check came in the mail and they in fact paid me 92%. Not shocking news, but it is nice to have a good experience with one of the resellers.
Selling your 76 cards to Cardpool should be no problem. Just make sure you read Chasing the Points to avoid paying for postage.