In reply to SDee:
Sorry, not able to confirm but as this was a bus I used a lot to get up the hill several years ago just doing the same as you've done and checking the current timetable out of curiosity.
If it really is weekdays only that's pretty shocking and even on those days it appears to be a very reduced timetable. Used to be more services on a weekend even because it wasn't doubling up as the school bus so I can't understand why they'd do away with it completely. I hope it is only temporary, plenty of people arrive in Aviemore by train.