It seems that the reason why this makes sense is Spot instance pricing - it wouldn't be economical with normal instance. But don't they pull the instance out f

It seems that the reason why this makes sense is Spot instance pricing - it wouldn't be economical with normal instance. But don't they pull the instance out from under you if someone outbids you? Does anyone have experience with that? And one more question - how is the performance? The OP shows screenshot of game running in 1280*800, but that might be because of the macbook resolution. Can it do fullhd or 4k?