There was a period of time in the past when Forbes did sell links through a partner.

FORBES: The Pains of Rebuilding

Because Google ranks sites in its search results based on how many other sites link to them, many high-ranking sites will sell links to low-ranking sites, earning cash in return for boosting the low-ranking site in search results.

FORBES: Magazine Article

Enter Ganxy, a New York start-up that allows authors to create a showcase for their novels, complete with links to all the major retailers and even the option to sell direct through Ganxy or other sellers.

FORBES: Ganxy and DPD: Showcase And Direct Sales For Self-Publishers

Unions representing classroom teachers have mixed opinions about the bill - but many have criticised plans for more links with the private sector, and to allow more schools to sell their own services to others.

BBC: More freedom for secondary schools

Near the bottom of the New Scientist homepage are "sponsored links" that launch the curious to odd destinations including teeth whitening sites or German language sites that sell women's shoes--places that are probably only marginally interesting to most New Scientist readers.

FORBES: Magazine Article