Receiving Traffic from Yahoo without listing?

Not sure why?

[esoteric]

I launched a new site a few weeks ago, and never considered SE's when I launched it...
From day 2 or 3, I started receiving traffic from yahoo, and Yahoo ONLY - to date, nearly a month later, none of the other engines give me traffic, but I receive around 50 to 100 visitors from yahoo per day.

I've searched on yahoo for my site, but without much success..

Any ideas why I'm receiving traffic from them?

The only thing I can think of, is that an affiliate to my program has redirected his yahoo listing to my site, which is causing the traffic.

[korkus2000]

Could be. Have you tried searching and choosing directory results instead of web? If you have affiliates then I would suspect they are getting this traffic.