It does matter, though, because of ILLs.
If you're only going to be able to ride one or two rides via Genie+ on a busy day, you'd be better off spending that money on ILL purchases -- unless they suddenly start charging $30+ for an ILL, but based on current pricing -- because you'd be getting a lot more value for your money. If you were already going to buy the ILLs then it doesn't really matter, but for people who aren't planning to shell out $40+ per day per person for rides, why pay the $15 per person for Genie+ for one or two secondary rides when you could spend $20-25 per person for two headliners?
It's a very different calculation if you get to use Genie+ for 5 or 6 rides (even if the overall amount of time saved was the same, but that's probably not true since the bigger rides often get similarly long wait times regardless if crowd levels, even if they're slightly lower on less busy days), or if ILLs didn't exist at all.