I went to Aquatica on Saturday and didn't spend a dime inside the park. I still love SeaWorld and my cheap pass with all the free tickets (took 4 people to Aquatica Saturday and had a real nice time) but yeah their food prices are annoying. I will say that I've been to concerts and sporting events and stuff recently that were the same if not worse, but yeah they're bad and the surcharge on top of it all is dumb.
With that said, 90% of my trips to SW these days are me showing up at park open, riding a bunch of coasters then leaving around 1 or 2 without spending any money on anything inside the park. It's still worth it to me to keep my cheap pass to show up a couple times each year to ride some coasters when we're in town, but I understand the frustrations people are starting to have with those parks.