There is a bit of a difference here that they don't make the max bet amount known and you kinda have to figure it out by finding the max win amount and dividing it by whatever the multiplier is. Combined with the fact that they would happily collect a $5000 loss for a $2000 max win.

I can't think of a good excuse for an online casino to not enforce the max bet upfront. I'd be more concerned if they turned my webcam on to track me down