[tomp]

> On Google search sometimes the people who will pay for ads are sometimes a better signal than those that SEO their way to the top.

Are they?

If you have 2 products that sell for X, one company spends Y on ads and X - Y on product, the other spends X on product. It would seem that the second one should be SEOd (by good reviews and recommendations) to the top, and that would be the more important signal.

[TeMPOraL]

For me an ad is a signal I don't want that product. Most of the time ads in search results are suboptimal compared to organic results anyway.

[maaku]

Too simplistic a model.