It works because it takes 5 of a kind, and not scatters, to trigger the bonus. The "manipuation" is down to the fact that the bonus round can be retriggered, and with all 25 lines active for a retrigger. A good bonus round, all 25 spins and one or more retriggers, will pay a great deal for a relatively small bet.
A sneakier manipulator comes into play if these slots are NOT true video slots, which is what I suspect given that the operators can alter the payout percentage without tweaking the paytable. This might make the bonus just as likely to be triggered with less lines in play, which would not be the case with true slots. Adde to this, we know there was once a "bug" in the bonus round, one that simply could not happen for a fully random bonus game.
The above is what I tried with the free chip at Virtual's VIP Lounge casino. If anything would give me a fighting chance to beat the chip, it would be this. Sadly, I didn't get a good 25 spin bonus round, but I almost managed to beat the
WR
This idea has been posted before, and I tried it after seeing a post about how the bonus always plays on 25 lines, regardless of how many lines were played originally.
The other issue is, of course, the RTG cap of 40,000x line bet. If only 5 lines are played, this should make this
cap far higher for the bonus round than if all 25 lines were covered - this would be of benefit with a very big line win during the bonus round, which of course would also give a retrigger on top. It is also possible to win more than one retrigger during a spin, as some positions give a 5 of a kind win on more than 1 payline, which could lead to 50 extra spins or more.
In order to assess this properly, it would be necessary to play many thousands of spins with this stratregy, to see if there really is any long term benefit in terms of payout. Clearly,
RTG think there is none, or they would have done something about it by now.
A true manipulator does exist for a couple of the
RTG "classic" slots, and applies where casinos offer very large percentage bonuses, such as the Virtual group and Crystal Palace. This pair also know about it, and have the appropriate "
FU Clause" in place to deal with it (they reserve the right to reset the games if they believe they have been played with manipulation in mind, something they can just "deem to be the case").
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