It’s the same as any other “I didn’t see it trigger enough” post.
Take a coin out of your pocket or wherever you have a coin. Flip it once. Now flip it again. Did you get the same thing? Flip it a total of 10 times. Did you see 5 heads and 5 tails? If so, make your way up to 20. Is it still 10 by 10? Keep going, 10 tosses at a time, until it’s not.
There will be a number where you don’t have 50/50 in your results. That’s because there isn’t a Probability Fairy who makes sure the coin balances. Gambling wouldn’t work if there were a Probability Fairy. You could watch a roulette wheel long enough to figure out some number or other is “expected” and break the house. Same with slot machines, you could carefully count pulls without a jackpot and only choose to play when the Probability Fairy is about to force a win.
Now, one can argue Poker or Blackjack are subject to card counting. That’s because dealing cards out of a deck is NOT an independent event. Every card that’s dealt changes the deck, so the next card has more well-understood probabilities. If you know there are 4 decks, and you’ve seen three of a particular card dealt out, you understand the odds of getting that card are extraordinarily low.
But Devour is not a poker game. Every devour is independent. That means even if you have a 90% chance, it’s possible to fail 2 out of 3 attempts with a not-insigificant probability. If it were NOT possible, the RNG would be just as broken as if it were common.
This is very hard to understand. Our brains do not intuitively understand probability. This is why gambling works and why casinos and F2P games are very rich.
Even 10,000 trials showing a large aberration is not enough to prove a problem. It takes several sets of players showing 10,000 trials going wrong to suggest a problem. The larger ‘several’ gets, the lower the probability it could happen and the more the problem is suggested.
So when we’re talking dozens of pet rescues, or even hundreds, I’d argue it’s very likely we could find 10 people who think devour never works on the forums. Sometimes you have to be really lucky to encounter a form of bad luck.