How many times hove you been to a website and could not tell where the ads stop and the content begins? You spend a few minutes trying to figure out what the site does? And then you leave.
Knowing when is enough can be a tricky thing. It also depends on what youre trying to do with your site. If your goal is only to sell stuff on your site then maybe having ads cover 95% of your site is a good thing. But if pushing content is your thing then maybe 30% is better. There needs to be a fine ratio between content and ads. This ratio can even be seen in the keyword/content relationship. Search engines start to reject sites that have over a 20% relationship. And people start to reject sites that have too many ads at a certain point too. Although no one has come up with a survey or poll to figure that out yet, it doesnt taker a rocket scientist to know your sites not working. Maybe they did have a survey page, but it had too many ads, I would have to say that the ratio should be between 20% and 30% depending on your page.
You page should be easy to navigate through. Your content should be easy to find. Yes, there are tricks to make the ads look like your...