Therefore, you stand a better chance of winning something! If you put a coin in one of those and hear it going down the back, you know the last player/players have chucked lots of money in, so it's got to give a few small wins, as it doesn't have any pots to fall back on and it's got to pay out its percentage.  So you've got a good chance of getting ABOUT £70-80 out - you'll never get the full 90%, it'll keep a bit back to give a 'surprise' randon(ish) jackpot out to someone at some future point. £70-80's doable though.
 (Keep in mind that percentages are retrospective and are based on the receipt of money, which is why machines "go cold." Vegas - and all casino - machines are dollop payers.  One dollop covers the percentage, so they can happily go stone cold again after that One Fairly Decent Win (remembering they're topping up the pots all the time and the pots count as part of the percentage but they'll only get hit once in a blue moon!))

 If you hit a row of machines with coins falling down the back after a busy day in the little casino, which we refer to as "arcades," you could get up to £80 out of each machine.  If you're lucky, you could go down a row of machines, win up to £80 from each one, and walk away with about £300.  I know it's not thousands, but small jackpot machines have a better chance of winning because they have to pay out more wins more often in order to have The Occasional Massive Dollop as a back-up.  Instead, they need to do it in short bursts of small victories.

 The trick is to know when the streak's come to an end.  If you think it has, and someone else goes on and gets another bunch of wins, good luck to them.  You've won.  They've won.  Happy days all round!  I've never been in Vegas, or even in a casino.  But I fairly frequently go on the tiny jackpot machines in local arcades and, by sticking to my rules of only playing the full ones, I fairly often take a week's shopping money out of them.  If I lose £20-ish, I'll leave.  On many occasions, though, I've gone in with £20, stuck to my rules and emerged with £80-100-200 sometimes if I'm lucky enough.  And if I lose it's only £20, I'll just keep out of the places for a few days or more. Check out Mega888 download.

 But your contributor's right.  Machines are NOT random.  They cannot exist. They're computerized.  Computers can NOT generate random numbers because they're working off algorithms and sets of rules - 'randomness' and 'rules' cannot belong in the same sentence!  All computers can do is generate long lists of numbers that LOOK random - but will repeat themselves after awhile.