Is this for real? Those type of odds on just a 4000x hit? Wow.
I wonder what the odds are on prags to hit those. I thought I read its wayyyyyyyyyyyy less.
As said, different design philosophy, so different way of calculating the curve.
Scratchcard slots (scripted balls-in-the-bag) can be extremely precise in their volatility - so if a provider wants to put 5%, 20%, 50% in those big wins... they can. The race to the bottom ensued, and one-in-a-billion shots became 100m, 50m, 20m, 5m, 1.6m, and now as low as 150k with Bonus Buy Parody.
More traditional slot design (reel-based, and to a lesser extent multi-phase scratchcard slots) have an extremely long tail to the volatility - and that's considering
one spin rather than one game round (respins, bonus rounds etc). So the odds of hitting a traditional "win up to" (
one spin) will be tens or hundreds of millions into low billions - as expected.
The problem is when people translate that to "max win" streamer language, because it makes no sense. Immortal Romance would be beyond 1 in a googol (100 zeroes) - because you would need a bonus, then 25 full screens of Sarah. The difference is Immortal Romance doesn't claim "win up to 250000x" or such nonsense - even though it's theoretically possible.
Contrast with a provider like Pragmatic, where you have slots like Extra Juicy ("60000x") that focus on that amount, but the curve is so off that it's probably closer to a 500x slot with a rare 1000x+ hit and a near-impossible jackpot hit (again? oh the irony). The odds may actually be in the Reactoonz 2 ballpark it is that unlikely. Newer "streamer" slots are much more top-heavy, so those numbers will be considerably lower because the focus is on max wins and bonus buys rather than the base game or having a playable slot.
That doesn't necessarily mean the slot design is bad, it means people have been warped into applying scratchcard logic to traditional games.