"Another thing, it used to be assumed that when you put a coin in a VP machine the shuffle quit and 5 cards were selected for deal and 5 more for drawing."

Not true. On the first coin in the Ramdom Number Generator locks in your first 5 cards. Any other coin in has no effect on the deal.
RNG starts again, after you hold your cards, the deal button stops it and deals your draw cards.

True odds on a royal on a "FULL" pay jacks or better is one in roughly $35,000 ran through the machine.
Those numbers are from memory and could be a little off. The odds go up on NON FULL pay machines.

All NON FULL pay machines are unbeatable if played on a regular basis. That does not mean you can't get lucky!!