Universal's system is much better, though. There's no paying extra for their most popular rides. A couple of their newer rides are excluded, but they run a free virtual queue system instead. For most rides you just go to the ride and join the express queue. There's no having to get online at 7 am to compete against everybody else with a
Genie+ pass to get a good time for a popular ride. There's no constantly checking your phone during the day to see what you'll be able to go on within the next half-hour or hour. That also means I won't have to carry a power bank around with me to make sure my phone stays charged. I'm guessing that $100 ticket you've quoted is the unlimited express pass, which lets you repeat rides. My son loved the Spider-man ride at UO, so we rode it 4 times in just over half an hour. My daughter loved the Hulk ride and did the same there. Good luck doing that with your Genie+ pass.
On our trips to UO we've been able to ride every ride in each park in one day, with multiple goes on favourites. Good luck getting on every ride at DHS or MK in one day with Genie+, even with the upgrade that you pay extra for.
Plus, as a family of four, it provides an incentive for me to stay onsite as it's included in the cost of the hotel room. I get two days of unlimited express passes for the four of us and a nice hotel room for less than the cost of one day's worth of passes for the four of us. It works out at about $50 per person per day.
So, yeah, Genie+ is cheaper (though not by as much as you make out), but it's not as good and I know which I prefer.