Selling dubstep music online is an option, but right now it's not proving the most popular format for the scene.
Giving dubstep .wavs away might suit you Dubmugga but it does nothing for the scene's artists in the long term. it would be a barrier to DJs who promote the release by playing the vinyl (still the majority of club djs use vinyl) and mean the artists make nothing in revenue either in the long term and the short term.
no one in dubstep is sitting around and waiting for anything, electronica or otherwise - they are getting on with building the infrastructure themselves - but there are financial barriers to everything, from putting on a night, to cutting dubs, to releasing vinyl, to promoting music - even to playing on radio. those barriers won't be surpassed by giving all of the music away for free.
anyway your argument is self-evidently wrong. if people could get and stay big by giving all their music away online, they already would be.