I'm not sure if any one single person can figure out an algorythim if there is one, because the thing is ment to be played by god knows how many people during the day, and if the jakcpot has a fixed number of daily wins, then you can't really figure it out.
But, just by supposing it makes any sense, the green wad of money thingy ussually came up in the top row for me, and the coins and the clint sign in the bottom row. I think I've seen the bag maybe once in the middle row, and if I play with less than 3 slots prizes mostly come in rows I'm not playing.
Back when Oscar's gave 10 000 i've hit them about 4 times and always in wrong rows.
The jackpot is 250k and 10 tickets cost 125 ctz. So, the jackpot worth 20000 tickets.
Assume that using 3 tickets each time, you should get jackpot around 6667 times for playing this machine.
Since some bodies said that they play over 10, 000 times, it means this machine doesn't worth to put your ctz to buy tickets to play. It just like the casino in the real world.
i) Just because someone hasn't won in 10,000 times doesn't mean that the slot machine is not worth putting your money into. There is still a decent probability that a person will lose more that the mean or expected number of rolls for three Oscar heads. If i flipped a coin three times and they were all heads, would you say that coin is biased and not worth a 50/50 bet at?
ii) This is just a single person. If this occurred numerous times, i.e. many many people with much over 30,000 rolls without hitting the jackpot then you may have a case (cf. Central Limi Theorem). But it is just one example.
iii) Another person may win it on much less than 6667 tries, 3 tickets each time, e.g. on their 100th go. Does this make it suddenly worthwhile? Of course not, but your example of one person not hitting it in however may goes doesn't make it not worth a go.
iv) It's gambling. There's always going to be cases where people get Lucky and others don't. We don't know the odds of each (should be 1/20,0000 per ticket) and I doubt UR will publish the stats so you can't draw a conclusion from a single case.
Yes, it is true that my calculation is not counting small winning and also free ticket. And yet it is not a very precise calculation. I just wanna to point out that this machine is a gambling (just as you said). And because other prizes is not far less than jackpot, I think it is reasonable said that buying a lot tickets in order to hit the jackpot has the risk which is quick high for not getting it.
Of course, I very hope that there is an official odd for jackpot and also other prizes