Probably one of the reasons the concept was overlooked prior. While you have good sound quality, a clear and unique voice, and actual things to say, this is far from the norm. You know, flood gates an' all.
Yes, I suppose this is true. Basically anyone can put an iPhone in front of a tv and yell while playing a game. Then there are people who put effort into videos, practicing the game in question, doing research on the game, making sure they have at least decent equipment, so on and so forth, and I'm really hoping we see a lot of the latter here in the near future.
Also Bimblesnaff, if you're looking for a more announcementy announcement, Team Kirby Clash Deluxe(a fuller version of the Kirby Clash minigame from Robobot) just came out on Nintendo eshop! Free to download too, which is nice.