I mean, they took an idea and excuted it, where they got the idea doesn't really matter. It's like saying "yo did l1p rip off pbp because they did a park shoot this year?" not the best example, but you get the concept. They actually did a very good job, great pr for their resort.
You can when they straight up ripped off Life Cycles. You can tell what's an original idea of Sherpa's because it's usually horrible and ruins whatever skiing is being displayed... or not being displayed in most cases.