Sure but do those prices go up as it gets closer? And what if someone pre-purchases their $139 lift ticket and it ends up raining? I can see why the occasional skiers are deciding to pass on the sport.The nearly $200 per day walk up ticket price is only for people dumb enough or rich enough to pay that price.
Just for kicks I looked up single day advance purchase lift ticket prices at Sugarbush with All Mountain tickets at a high of $139 on weekends with plenty of days available at $109 and $119. Mt Ellen only tickets range from $50 to $79.
As for me, I'd likely never buy day tickets at that price to ski outside of my pass. (Again to my point from earlier about friends not skiing together anymore if they have different pass products)