TinkyWinky - 8:44 pm on Nov 25, 2004 (gmt 0)

Couldn't an affiliate just register a domain and redirect it to the merchant account and bypass the 1 advertiser per URL idea?

Yep - but then he would have to bid against himself to be allowed the 1 slot alongside the Merchant for that keyword term.

It's one available position for a keyword term:

e.g.

"widget a" would allow Widget A Ltd + One other site to advertise against this term.