If I am not mistaken, the cards are not random. They are the discards of your deal, that are "shuffeled back into the deck". If you get your discards again on the draw, you win the bonus.
Also, the bonus is not 67% but 13.4% in my game, you may have misread. (You win $0.67 on denomination $1 only with max bet of $5.)
I thought Amaya bought Cryptologic.
Are you testing the NJ version or 888 international? The NJ Amaya sites basically use IGT content for VP and non-proprietary games (BJ, roulette, craps etc) and SHFL for proprietary poker games (3CP, 4CP, UTH, LIR etc). I have a contact at a few of the NJ online casinos if you need to talk to someone there. I am sure they would be happy to help.