I don't run a heli op, so I can only guess as to their motivation, but I can come up with a couple of guesses.
1. They don't want to replace their gear every year with the latest and trendiest skis. It's just not worth the money.
2. Look at all the ridiculous fighting that happens on here when fat skis are discussed. "I wanna ski in the powder, not on it, blah blah blah." And that's here, where people are (IMO) much more knowledgable about gear than the general public. So, the point is, does Joe Sixpack D.D.S. want Pontoons to ski on during his heli-trip? Maybe, but I bet some people would prefer something more similar to what they normally ski, just fatter.
3. And to build on #2, how many people that *do* want to ski on something like a Pontoon already own one and plan on bringing it with them? If that's a substantial percentage, that further reduces the need to have many on hand.
All just guesses, someone at CMH or somewhere else would have to tell us why they've made the decisions they have.
Oh, and if the worst part about my heli-skiing trip is that I have to ski on Coomba's? I'm pretty sure I'd get over it.