But for us locals in Vegas it's free until Dec 29. And $8 is the overnight rate. It's a pain for sure, but not awful... Just avoid NYNY or the Monte Carlo during big event weekends at the new arena next door because they are charging $20-40 to park in their garages during those times.
I don't hit the Strip that often but this would just make me go to non-MGM properties. That is, until all the others jump on board and everybody starts charging.