Scobe's Quick Tip #8:
Computers and mathematical analysis have shown that Progressive Betting,
either increasing your bets after you lose or increasing your bets after
you win, does not change the house edge one way or the other.
The only change that occurs is in the "patterns" of your wins and losses
-- they are more explosive.
If you want to bet progressively then a "positive progression" (up as
you win) is better than a negative progression (up as you lose) -- if
you start your betting at a lower rate than usual.
For more on progressive betting read
Twenty-First Century Blackjack by Walter Thomason.
Scobe's Quick Tip #9:
The "hit frequency" on a slot machine indicates how often some money is
returned to you. It does not indicate whether a machine is "loose" or
"tight."
Often machines will return your original bet but nothing else. That is
considered a "hit." Sometimes machines will return LESS than your
original bet -- and that is also considered a "hit."
You can theoretically have a machine that hits 100 percent of the time
with no wins!
For more information on slots read
Break the One-Armed Bandits! By Frank Scoblete,
The Slot Machine Answer Book by John Grochowski, and
The Slot Expert's Guide to Playing Slots by John Robison.