Since joining Stake, I was and still playing Crash almost exclusively.
I am diamond with average bet size of $200 I assume, so imagine how many rounds played.
2 things I can say for certain:
1. house edge is DEFINITELY NOT 1% but more likely to be 10%.
2. Crash points ARE NOT random but rather too predictable and overlapping. That means if you play crash for 3 days consistently, you'll make millions, but only if you can control yourself from not betting on bad streaks, cuz it can be too nasty and make you lose hundreds of won rounds with 10-15 rounds in a row.
This game gives my friends heart attack but I personally enjoy it (at least when I am winning). But yeah, definitely not a 1% house edge.