There is no benefit to being able to buy it early. Well, no benefit to you, or me.I don’t really get what the advantage of being able to buy an ILL$ at 7 am is. I get for Genie+ why it’s an advantage if there’s some form of stacking. But ILL$? Does Disney really think all the desirable ILL$ slots are going to sell out before park open? I think they’re misjudging the demand on that a bit…. Maybe ROTR on crowded days. But Space Mountain? EE? MMRR? Even Remy’s? Lol, no.
Disney knows there isn't really anything to keep people on-site (once the revenge travel subsides) so they have to point to as many on-site "benefits" as they can.