You just HAD to ask, didn't you
First of all, a win of $1200 or more on a single spin/hand/play triggers the hand payout requirement, accompanied by a tax form. This happens regardless of how much you have in the machine, and regardless of how much you put INTO the machine.
Secondly, I was egging Meister on - he was pulling $20 a spin and he was ahead, so I told him to quit at $400 or $500 (he was somewhere in between) - so he did... then BANG...
Lastly, Meister neglected to mention that I followed him on most of the machines - and practically gave back what he had won...
"Gems" are what the casino collects from poor souls like me... in their case, it's an aptly named game...