Trusted Feed (also Paid Inclusion):

A trusted feed is a fee-based custom crawl service offered by some search engines.  These results appear in the “organic search results” of the engine.  Typically, the fee is based on a “cost per click”, depending on the category of site content.

Trusted feeds are well suited for web sites with hundreds [...]

Cost per Click (CPC):

The cost metric for each click to an advertising link.

I remember this type of advertising was all the rage in the early part of this decade, but has since fallen out of favor since the qualified leads are not as reliable or bountiful.

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Glossary Definition From ABC’s of Online Marketing by Alexandra Wharton, [...]