Good take.
This made me thing of all the GOogle failures in a different light. It isn't just that they abandon users. They also crush competitors in the initial phase (by being free, or generally having Google branding), only to pull the plug. We often talk about the users left with having to find an alternative, but not the competitors they crushed along the way.
Froogle 2.0? Let them signup and invest integration efforts to get an intial free spigot of traffic, then yank the rug and start charging on a per unit basis once it reaches critical mass.