Having made a few hundred skysurfs myself in the early to mid 90s through 2007, my opinion is it's just too difficult, which turns most jumpers off. Skysurfing is the most difficult of all disciplines. You have to be a very very good flyer on all axis. Wingsuiting by comparison, is very easy and does not take much experience to learn, 200 jumps and your wingsuiting, they are both very dangerous, however, it takes much more skill and experience to skysurf, yes there are exceptions, some are just natural flyers.