It'd be a foul in competition, right?
Ignore the rail for a second and imagine you hit with follow when two balls are frozen; most games require a 45° downward cueing angle to avoid double-kiss.
Without the cushion it's a simple push shot which is legal. The grey area is it is a double - maybe multiple kiss as well as a cue tip foul. You could petition for an exception since the shot would be useful at any angle.
I don't feel it would be a foul. With the upstroke, you don't double hit the cue ball. The shaft gets out of the way. I did have that slow mo close up angle. I think that shows that it isn't a double hit. Or maybe I needed to go slower.
20 euro for a year, or 30 if you want to play other players seems very reasonable to me. Since I can no longer play physically I may do the free trial, hoping to love it enough to fork over the cash.
