I've been researching themes, and have a couple of questions that I hope someone has run across.
1.Does advertising have an effect on theme power? E.g. if a football site has an advertisement for X10 spy cams, does it dillute the football theme? Also, does it matter if the advertisement is a banner ad, text ad, or popup/under? I would think that a text ad would definitely dillute the theme power, the banner ad might dillute (link leading to off-theme site), and the popup/under probably wouldn’t.
2.Which has more weight in a theme ranking algo: text link w/ descriptive text to a keyword named url, or a graphic with the same descriptive text in an alt tag, the same keyword in the name of the graphic file, and the same link to the keyword named url. E.g. I have:
<a href=www.domain.com/keyword.html title=keyword>Great source for (keyword)’s</a>
<a href=www.domain.com/keyword.html title=keyword><img alt=Great source for (keyword)’s> source=www.domain.com/keyword.gif></a>
Which would be more optimal? The reason I ask is that graphic navigation is often preferable from a user standpoint, although it seems that text is weighted higher in links for search engines…