Never got a max win (must say I did get 3000x)… tho first time I played… for sure, I deposited enough for 1000, maybe 1200 spins. And then that game time just kept going and going. Easily ended up doing 1500 spins.
And Jamming Jars 1 has been very generous to me. It’s a special-special game. I don’t know about official specs, but second one seems to be even more highly volatile compared to the first one.