Not like it's much different from performance-based bonuses etc. in a workplace.
If it helps me as a teacher to get kids to actually do work (and/or stop them distracting others from learning) then i'm all for it.... as long as I don't have to personally fund the rewards! Haha.
We used Compass as well for positive praise... how effective was it? Who knows. I think tangible rewards are much better.
"Positive behaviour support" is a HUGE thing in schools now. So too are schemes such as positive education, recognising strengths/growth etc. It's recognised so much that my MTeach had a
master-level subject dedicated to this area.
I understand why they're doing it because I've seen what positive reinforcement, rewards etc. can do in a school especially to those more troublesome kids.
Like, I know it's very easy to say things like "well, they should just be good because it's the right thing" if thats been our experience... but in reality it's not as easy & blue sky as this, especially with teenagers. I have to constantly battle with behaviour issues and have done so for the past year, majority of it is explained by external factors influencing the student.... for some students getting them to even write down notes from the board is a massive challenge (which I have also dealt with, there are other examples however this one is recent so it's the first that came to mind

).
Edit: I should probably also mention that I read somewhere a comment about this article (I can't remember where) regarding students with special needs who may not be able to "behave" (whatever the definition of that means) for reasons outside of their control. How do these students get rewards? Is there a consistent criteria that defines what constitutes reward-worthy behaviour? Something to think about.....