This 2007 paper catalogs the great multitude of new patent-related business models that arose in the wake of the flood of patents resulting from the dot com bust.
As this paper shows, patent owners in the 2000s looking to sell their patents faced a dizzying array of alternative sales approaches. The choices they faced concerned both business model and vendor.
This was too confusing for patent owners. In business, confusion helps only the lawyers and the ethically challenged. But in business, confusion lasts only so long before a correction comes along, bringing with it clarification.
By early 2009, it appeared that that correction had arrived.