Actually there are several 25 line games and more coming.
The thing to remember here is that since the machines occupy the same amount of floor space as higher denominations, in order for the casinos to get their profit margin, guess what?
LOWER PERCENTAGE payouts.
Playing the machines is a sucker bet though I play them myself [ Hey I never said I was smart ]. There are times you want to do something just to relax. These machines, fortunately don't require more than the ability to read and 2 brain cells to play
What I don't understand is why would a person play a penny machine for maximum coins when he/she could play the same machine at a higher denomination for the same dollar amount and get a better payout percentage.