For an ad network, why not set up niche websites in-house to serve on first? This involves time developing good content and ranking in search engines but could

For an ad network, why not set up niche websites in-house to serve on first? This involves time developing good content and ranking in search engines but could solve one side of the chicken-egg problem. You could help yourself by making a niche site specific to website owners, using it as both a seed ad server and a way to build your ad server-base. Convincing business owners to invest in advertising that is not being served anywhere would be difficult, even if CPC-only.