Yep, people even hit 900x, 1,000x or 2,000x but this certainly mostly happens with very high volatility games. Also, the more one spins the slots, the higher the chances of hitting a high multiplier at one point or one day.
This means you need to have some good balance in your account just in case you are to go for let's say 1,000 to 2,000 spins without any big multiplier win.
I have never seen someone able to achieve 900x to 2000x free spins. You're too lucky if you can get that huge multiplier. I am sure if it hits me, I will think that it's a bug with slight happiness.
It's a normal reaction if you win a huge multiplier isn't it? but I think it only works on those who have large bankrolls, and most of the slot games available to me seem not to work well compared to the games that I usually see in the contest, mostly Hacksaw games that can hit a 600x multiplier. I usually see these games on the Betpanda contest, but I can't play them.