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I'd bump that estimate up to 99% of gamblers since the distribution is so large. The x22 multiplier implies that you will need at least 55 in x0.4, 22 in each of the x1's, 20 in the x1.1s, about 18 in the x1.2s, almost 16 in both the x1.3s, 11 in the x2s, 7 in the x3s and ~4 in the x5s for a total of 153 balls landing in other slots before you can get a 154th and 155th ball to land in each of the x22 bins.
All the above applies to the green bin.
So assuming we assume the balls are equally distributed in Luckybit, you have a 1.29% chance of landing x22 on green. But since they're not distributed equally after one set of 155 balls, your chances actually go down; Say if they get distributed evenly after 10 sets (for calculation purposes only, the game seems to use an infinite set), your chances go down massively since it's rare to get a new x22 green ball.
You have wrong those odds, you don't have 1.29% chance fo landing on x22, the chance to get that spot is 0.00304%, this is the chance to get the spot from the middle to the edge:
x0.4-19.6%
x1-34.9%
x1.1-24.4%
x1.2-13.3%
x1.4-5.55%
x2-1.71%
x3-0.0376%
x5-0.0488%
x22-0.00304%
so, in theory each 30400 bets you should get the x22, but since the bets are random you can get 2 in less than 10 bets.