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Kontera pays 50% and is a "tolerable" alternative if you don't want to have the ad-looking blocks on your page taking up space. The Kontera contextual placement leaves a lot to be desired, however, so it should only be used on content you are not emotionally involved with.

For example, from a phrase like "Web design services" you could expect to get ads related to housekeeping and bumblebees. When you're emotionally tied to your articles this really rubs you the wrong way.

Well, I don't think there's a better way to say it so I just will: Konteras developers are morons. The way the Kontera advertising script file functions, it downloads over 150kb for every page view. A well-designed and reasonable length page, including graphics, should be, at most, 120kb - so adding this extra 150kb (or more) for every page you've placed ads on your site will increase the load time for all page views to at least double. Probably more. This means that your ads alone will extend the time for a single page to load on dial-up by at least an extra 35 seconds, and as much as 1 minute 15 seconds. For each page.

Kontera, as a contextual advertising system, cannot be used with Adsense.
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