Scenario 1:
The word "bidding" is a better word than "auction" as the project needs to
support people bidding on content they want somebody to host on their
websites. For example, Bidder_A offers a bid of $1.35 to pay those willing
to put the content on their websites for a specific period of time.
Bidder_B gets involved and says she will offer $1.40. Then Bidder_A will
have to offer $1.45 or drop out. The owner of the website does not have to
accept either offer. I heard Google AdWords works something like this.
Scenario 2:
The owner of a website makes it known they are looking for certain --types--
of content. The business operating the website has many visitors interested
in the specific type of content. So the owner runs an "auction" to auction
off the space on the page.