So for a massage, the first 25 min is $55.
Add 25 min. to that and it's an extra $25.
Add another 25 min. and it's another
$50?
That does not add up

Since I pay $70 for 60 min locally, sometimes discounted, $80 for 50 (with 10 for dressing to make 60, presumeably) isn't too shocking for a resort.
Of course that same 50 min. massage is $30 over those prices at the GF or SS.

I can only assume that those take place in outer space on a gold table.
Since it's an outside company, I'm having an uncomfortable flashback to a Palm Springs resort, a quite nice one, where I got a 1 hour massage at noon. It seemed short, but I figured they counted dresing time. Took my time leaving, and my room was a good distance away, a long pool the size of 2 normal pools was along the way, and I went slowly trying to spot my wife and son. Despite that, it was only 12:47 when I got to our unit!! That sure knocked the relaxation out of me.