You'll need a lot more time or money or both. General directories need more links, articles, content etc as they obviously have thousands more topics to cover.
I think it's fine to add adsense to a directory if it's done correctly. OK it may cheapen the look of a directory but not as much as a directory without ads that has no content or spammy content inside the categories. What I don't like is when the ads are placed to try to make me accidentally click on the 'add url' adsense link. I think a good example of a directory which uses adsense without compromising it's design or quality standard is Romow Directory; JoeAnt is another example of a directory where adsense is used as an additional revenue stream without distracting from it's quality content.
I add adsense in several directories and it is fine. The result is not very encouraging but better than nothing.
If it generates revenue, why not? Just don't over do it. My suggestion is to concentrate on building and maintaining a decent, well organized directory. Your last concern should really be how you can monetize a directory with PPC adds. Build a decent directory, and the revenue will be there, Adsense or not.
I use adsense on my directory, but as many people already pointed out it will not generate a lot of revenue. I do take issues with some of you that automatically think that Adsense=A cheap Directory. I have seen adsense everywhere including top directories and popular sites, so I don't think adsense by any means should be seen as a bad thing unless you don't follow the guidelines.
Yes I suppose you are right... I'm only looking from my perspective and forgot what most directories looks like. But if each site submitted to the directory get it's own review of 250+ words, I suppose we have a different scenario. A directory with a lot of unique content/articles about websites. Then even a general directory could get a lot of traffic. But that will cost either money or time as you said...
but why to bild a directory if not aded adsense for cash ? Because peopel do not pay anyway, so better make them click on adsense placd near the submision buton
Because a web directory should be a resource for web browsers to find relevant websites. If all you want to do is get people to accidentally click your adsense link you are a scammer and would make more money shuffling cards.
You have much to learn about directories. To myself and probably 98% of others that is the biggest turnoff and an instant get me out of this garbage site. laterz malcolm