So, I don't think Disney will have a way of knowing who bypassed the Queue or not.
Essentially: My assumption based on being in tech and working for a company that actually makes some of these queue software packages as well as bot management:
A large volume of companies ask for stuff to be designed as "Fail Open", meaning if it doesn't get a response, or something breaks, or any one of a multitude of ways it may fail, the customer does not get blocked, instead they make it through.
My guess is we are crushing the waiting page, and some folks have been able to get through via the fail open mechanism.
The specific link:
https://disneyland.disney.go.com/admission/events/oogie-boogie-bash/purchase/ is actually just the purchase page. Its the same link the app sends to, which is just a generic purchase link, there is nothing special about it.