I know this is not a good strategy of winning the jackpot on a fruit machine, but because I'm bored, I decided to see how many losing spins the machine can handle on max bet before it forces itself to pay the money.
What I did here is basically the opposite of the common method of playing: not holding or nudging a winning combination or a feature combination, trying to not win anything from the feature (even when its on GATW), and doing the gamble until I get nothing or the jackpot. If the feature is GATW, I find a way to get out of it without winning anything (like losing the repeat space gamble or taking the feature that has a chance of not paying anything).
These machines are played at the max stake.
Notable results
DOND The Crazy Chair/The Big Deal/CYBTB etc. (BFM) - After playing as much as 800 times in each machine and not winning anything (even on Go All The Ways), my next feature entries will always be GATW. On some machines like DOND Mega, it will respin to 3 bells (which pays the jackpot).
It's Amazing (Barcrest) - After over 150 spins, the machine resets and gives a critical error message.
Showtime (Reflex) - About 300 spins. When I tried escaping the GATW by losing on the repeat space gamble after getting the next number hint, it displayed that I won the gamble, even though the number landed would result in a game over.
Pie Factory (Vivid) - About 40 pounds in the 15/0.30 version for it to start the "always GATW" mode. However, I can easily exit the feature by landing on Lose during the skill stop. It's uncommon for the machine to not give this opportunity.
The Simpsons (Maygay) - About 20 pounds in the 15/0.30 version. I had to be lucky to land on the skill stop space where I can stop on the losing space when the feature round has invincibility.
Reno Reels (BWB) - About 30 pounds in before the machines gives out nudges for every spin. That streak ended when I landed on 3 blue 7s for 4 quid. Getting a Bust in the feature spins takes forever too.
Monopoly Road to Riches (Mazooma) - About 300 spins before it spun the jackpot and puts the jackpot amount in the Safe so that I am guaranteed to win that amount.
Invincible (Red) - Literally takes forever.