You realize that off-board payment isn't the only thing that differentiates a route between it being a limited route and a BRT route, right?
From Wiki, they're somewhat the same, but they differ in that the limited service doesn't share most of the common features of bus rapid transit such as unique route branding, off-vehicle fare collection, signal preemption, frequent all-day service, and dedicated right-of-way such as bus-only lanes.
Sure, the S79 doesn't have off-boarding payment, but that doesn't immediately mean it should have been called a LTD. There's various other factors that go into play.