I do not listen to progressive house in single tracks. That doesn't even begin to make sense - progressive house is all about the progression across a set.
The input of a DJ in selecting, arranging, mixing the tracks into a set is what makes electronic music great to me. I would not buy single electronic music tracks, but I might consider paying for a subscription that would give me access to vast amounts of sets by the likes of John Digweed, Anthony Pappa, Sasha, Dave Seaman, Mirel Jarca, Nick Warren, Danny Howells, etc...
Also, worth noting, if I can't download them to my computer in a DRM-free format, those sets are absolutely worthless to me. However, I'd be very willing to pay a subscription fee (even with a - reasonably generous - limit on the number of sets that I can download. In fact, I used to subscribe (for money) to freshlymixed.com, and all they did was record and republish Digweed's kiss100 mixes and the Essential Mixes from BBC 1.
I listen to whole sets, not single tracks... why have a per-track buy button?