OIOpublisher is an ad manager, written in php, that lets you control the ad space on your websites. They also offer a marketplace to help you engage with advertisers.
What can I sell with OIOpublisher?
You can sell banners, text links, in-text ads, paid reviews and even custom products or services.
Both blogger.com and WordPress.com are examples of hosted blogs. Blogger allows you to use ads, but only if you have access to your own web host to install OIO on. WordPress.com does not allow the use of advertising at all on its blogs.