Why are you surprised its sold out?
Not surprised. I used the term wild as in wild as it is impressive to see it.
No major theme park has ever opened post Disneyland that consistently sold out for that many days consecutively where Employees are also blocked out.
It is a new era. When IOA opened in 1999 the internet was different(Port of Entry had an Email Internet Cafe!)
Wild not but surprising, so it is cool to see. There is no AP add on feature for gratis days. Nearly every guest you see(because for sure there are VIPs somewhere) payed at least a value of 117 bucks to be there, or far more that day. No other opening of a theme park in Central FL since has been able to do this. Sell out without AP add on and many paying 3 day to a week packages.
And as confusing and frustrating as it may have been to wait for day tickets to go on sale, I think it worked for Universal's goal of banking more people onsite with packages.
I also imagine more days are going to sell out. Over two weeks are sold out after opening day, at 17 days and we are still over a month away.
The future may fizzle a bit or economic whoas could happen if people want to speculate that, but there is no doubt that this park is a slam dunk for the resort right now.