But ehow allow affiliate links?

I have seen people promote affiliate links there before so im sure if they can do it then so can you. I also heard last year that some people were banking pretty good using that method. Things like working on cars and using an affiliate link for tools to use.

On eHow, your landing page should be looking informative, otherwise they don't accept. In my network (see my sig), it's totally free and you can use your adsense also.

yes.. where theres knowledge, theres money. has to be quality info though

Why would you put your quality info on somebody's else site? That has never made sense to me. You're only helping them make more money.