But I don’t think so.

Do you bake your bread by your self?
Do brew your beer by your self?

Why not, you can save money!

Ok, let’s get serious:

An ad network has several advantages: It makes the marketing directly to the targeted group of potential advertisers and accumulates them. Ad networks are mostly the single point of contact for marketing managers who have budgets to spend. And they will not search for single blogs and websites which like to market their ad inventory by them self. Otherwise you are TechCrunch or some of the other big players out there.

The publisher has the option to choose from a wide range of clients (with ad budget) who search for a publisher in their targeted niche, to write a paid post or to take a banner or text ad on his blog or website.

Theoretically this is a good idea to market your ad space by your self, but when you practice it you will mostly not get connected to interested advertisers (with good budget to spend). You need to invest a lot of time to acquire advertisers by your self and by the end of the day you will discover that your investment did not paid out and you did not save any money!

Moreover you have let a lot of money on the street, instead of concentrate of that what you really can do well, write your blog.

It’s your choice, try it if you like.