still pays "$7.50" just the same.

Look at the history of Stratosphere Casino at the near end of Las Vegas Blvd, after so many years - they introduced $2.50 chip.

There is no need physically per se for a $2.50 in "slot machine blackjack" because, if they are lucky with the "one armed bandit" they get it printed in the
receipts of at the end of the play to cash at the Cashier's Counter.