Many of the attractions in the tier 1 lists currently have G+ availability well into the morning and past noon on most days. Plus some of the true Tier 1 rides are locked behind ILL/VQ anyway. If your first pre booked LL is pretty early, no reason to think there won’t be some availability after you use it. Now if you’re hoping to book slinky dog at 1030 or something probably not.
I agree with others there will be additional drops throughout the day as well. With a free system they could get away with people maybe only getting 1 Tier 1 in a day. With a paid system the blowback would be huge and they know that.