When the profits go out of a market, you lose the mom-and-pop stores first, followed by a wave of increasing consolidation that leaves a de facto monopolist, whose services degenerate and stagnate, and finally that last one goes bankrupt.

Blockbuster was the death throes of rental video, not the glory days. And arguably Google Reader was the death throes of mass market RSS, kept around for awhile as a profitless zombie by Google's deep pockets.

What has since emerged is "niche market RSS" as a viable business for a few.