Edits recently have been a bit like the music industry recently (bear with me, tldr at end).
I'm constantly being told that it used to be really difficult to record music, and that to record, release and promote your own music would cost tens of thousands of whatever currency you use. Now however, the equipment to record your music is far cheaper, and promoting on the internet is free. All the really good music from established, good, artists is still being made and promoted; but there is another layer of shit music that has emerged (just search for any classic rock band on soundcloud, listen to peoples 'remixes'). This has good and bad sides. The bad is that anyone looking for new music has to trawl through endless amounts of shit to find it. The good however is that if a young artist/band is good and persistent enough, they are far more likely to get noticed.
The same goes for ski edits. Awesome cameras are far cheaper. I paid £850 for a Canon 60D with four lenses and several other add-ons; and gopros are ridiculously cheap for what they can do. Also with a really easy hack (or torrents) anyone can have Adobe premiere (or any other software) for free. Both camera and software are really easy to use, so virtually anyone can create an edit. This has the same pros/cons as music - we have to wade through more shit/not-so-good edits, talented young skiers get to show off to us, and all the top skiers like Delorme are still making edits. Since only the upper-average plus edits make the homepage of NS, most of us don't have to do much wading through shit. Of course some edits that are 'top rated' are better than others. Some are pretty average, others are fucking incredible, but if everything was always the best we'd ever seen then wouldn't everything be average???
Tldr: Cheaper to make edits; therefore more edits; some are shit, others are incredible, most are in the middle; homepage only shows better-than-average edits; good for talented young skiers and other amateurs to get exposure; good for skiing.
"You're not afterbanging for the cameras, you doing it for yourself" - Tom Wallisch