the ad spots from a directory is exclusively for webmasters. You won't see chewing gum banner ads on a directory. If I understood your question well...
Different kind of publicity add in a directory to earn. (Publicity = Link Sales, Banner Sales, Listing Sale!)
well, mostly webmaster related ads, like hosting, seo, advertising, other directories banners.. those tend to blend well in directories, the thing is webmasters are almost all ads blind, it's hard to make them click on anything unless it's something webmaster related. note that selling ads space to other people on a monthly basis is not the only way to earn, if you have good traffic, you can always use hosting, advertising or other webmaster stuff affiliate programs. good luck.
Hello frustik, There is no one correct answer to your question and probably no quick fix, instead you will need to explore what are the best options for you / your site. I will give you an example, Let's say you owned a snack bar and you asked what are the best sandwiches to sell, some would say " ham & tomato " other would say " cheese " while others would say " salad " sell best for me. But works for one snack bar owner may not work for another, this may be due to a different age group or culture for example. So what you would do when you opened you snack bar is test sale each of the 3 sandwiches keeping notes and looking for what is working, for example salad sandwiches might work the best but you noticed that by putting mayo on them you sold more again. Always ( if you can ) run say 3 sandwich types and every 3 - 6 months take the one that is selling the least and replace it with a new one based on what you have learnt so far, this will allow you to keep track of sandwich trend changes as they happen. Lastly and very important is this, lets say we know salad sandwiches work best and infact you have the best salad sandwiches in the world but you have no customers as your snack bar is down the side alley in the city centre, then what you need do is bring customers to your door by promoting your snack bar with some signs pointing to your shop, if not your sandwiches will sit in the display cabinet and will need to be thrown out each night as there are not enough customers to buy them. Advetising / visitor stats will br the key to your success.