x1,000 on slot games is not that rare, you can ask those participants or check the contest thread since the first round.
There are many 1000x or even more hit by those participants.
Hitting x1,000 is not a guarantee of profit as you may hit it but the profit is still less than what you have lost while chasing it.
It's rare if you use normal spin (not bonus buy). They can hit more than 1,000x not because it is easy, but because of the combination of luck and persistence. Not sure how many hours they spent to get the big win. *hats off
I mean to say it in general, not in individual experience.
Agreed that hitting 1,000x or more is a bit rare for a user especially if the user try it in few hundreds spins only.
But in general, we can see so many records of hitting that multiplier (even max multiplier of specific game) by various players.