Liftopia very publicly crashed and burned three years ago, leaving many ski areas out large amounts of revenue --
this article provides some details. Major resorts were better equipped to eat the loss but it was a big deal for small independent mountains with extremely thin margins and I don't recall if they were ever made whole through the bankruptcy.
Individual advance-sale lift tickets in North America are sold on ski areas' own sites these days and due to the prevailing model of continent-wide passes to major resorts (Ikon, Epic Pass) and independent ski areas (Indy Pass), they aren't usually much of a deal, even if you purchase weeks ahead of time. This circles back to Tony and I citing in
the Europe thread the huge advantage for variety-seekers in the Alps because the window price of lift tickets there is in most cases a third or a fourth of what a similar mountain would cost in the U.S., allowing us to literally wait until the last minute to decide where to ski on a given day, if so inclined, without getting gouged.