This is what I think:
The machine does not recognise the player by membership card BUT the casino management CAN.
The casino choose the winner by reading his/her details thru the server and decide wheather or not to release the BIG jackpot prize to the player.
Machines located at corner/pathway or code number ends with 1 stands a higher chance to hit the jackpot. I have seen this many many times. The machine that I won the jackpot too located at corner.
REASON: Corner/pathway machine has more room to accommodate crowd, casino simply wants to tell more people that they are really giving away prizes.![]()
Well I've yet to witness any of this or to hit the big jackpot myself
BUT I do find that a couple of the End/Corner slots that I like playing seem most-of-the-time 'luckier or paying-out'
So HOPE that whenever these are free/available for me to play the management will NOT reverse (choose not to release/award) the jackpot SHOULD such be lucky enough to 'drop' when I'm playing


BTW - have found a couple of "2nd-position from end" slots BETTER than the end corner slots
eg Sinbad Money2Burn & a row of PP slots