Not only wouldn't anyone know when the "twofer" token in that particular fill of 50 tokens had been won.... who's to say that one had even been inserted?

It reminds me of the occassion when Trump Castle had airplane silver strikes in the display window of the slot machine ... but was paying out Hollywood series strikes instead. When I complained to a slot supervisor, she sighed and said, "what's the difference, they are redeemable for $10 each?" She was not the least bit sympathetic to my collecting interests ..... until I filed an official complaint at the Casino Control Commission booth on the casino floor. The CCC ordered the slot supervisor to either empty the hopper and replace the Hollywood tokens with the Airplane strikes, or change the window to show the strikes that were actually being disbursed, or shut the machine down. She opted to put an "out of order" sign on the machine ... for the whole weekend. On my next visit the following weekend, the airplanes were back.

On the chip side, Resorts had a distribution program for a set of NCV 20th anniversary chips that players had to put so many points (5?)on their players card in order to obtain a different chip each week. So in short, I guess I would pay a reasonable premium to obtain one of the "twofer" silver strikes without actually having to play the machine for a token that may or may not even be inside.