@The diro
Don't quote me on this, but Choppers spoke of it more than once and used the numbers to back it up, maybe he can direct you to one of his informative posts about the subject.
I think, in the long run, going from 96% down to 94% on the same game, a 2% difference, over time, gives the casino an extra 50% on top of the house edge it previously had while running on the 96% rtp.
Crazy to think that a 2 digit gap between rtps could make such a dramatic difference, but it does.
We just won't usually notice it in the short run. But due to getting less spins for your money, if paying attention, over time you'd likely soon notice that withdrawals are being made less frequently than when you used to punt the 96% version for the same period of time. Because you're busting out quicker on average for each session you partake.
Obviously you can't predict what returns you would get during any amont of spins turned over when comparing different rtp settings, luck will come be the deciding factor there. But it's obviously a good thing if you can give yourself more attempts to get lucky!
But the more spins you have on average before going bust per session, naturally means your sessions (and ultimately, your bank roll) will last longer, increasing your chance to find that lucky spin, which, obviously, also increases the possibility of hitting a huge win, thus increasing the possibility of the bigger, withdrawal activating wins dropping in.
That is, of course, assuming the 2% reduction in rtp wasn't achieved by directly reducing the odds of hitting a max win in a pre scripted game (ball in a bag theory, remove 1 of the bigger paying balls!), or decreasing the probability of hitting the max win in a none pre scripted game (by changing ceartin reel strips, swapping a symbol, or whatever).
With either approach essentially decreasing the chances of hitting a 10,000x win from what was originally perhaps 8 gazillion to 1, instead now into the realms of somewhere around the 450 gargantachunebarbasticallywtfisevengoingonanymore to 1, kind of area of probabilty.
Sumfink like that!