Premium, tiered pricing is definitely getting more attention in the industry on a whole. Six Flags is likely rolling out a 4-level tiered membership format. With each tier you get better parking; more skip-the-line passes; bigger discounts on everything including merch, food, and tickets for friends; exclusive concert seating; re-ride privileges for upcharge attractions; private park entrance; exclusive ride times; their own customer service line. It was incredibly extensive. While getting feedback for it, Six Flags even had (many!) questions point-blank asking if loyal guests should be treated better than everyone else. The message was clear and the new pricing is expected to go into effect his year.
Theme parks already have their premium experiences, but they've always felt very optional. Or at the very least, incentives for staying onsite, when it comes to resorts like Disney and Universal. But within a few years, I think premium uncharges are going to feel more and more necessary to have a good time.