If it's really free, why wouldn't you just give it away? Why would you need me to sign up?
If it looks too good to be true .....
If you are looking at this with the idea of selling advertising, I think you are looking at it from the wrong way, firstly if someone has signed up for Wordpress for free as a blogger, then they have to accept the advertising, that is given.
If someone has bought their own domain (like me) then when I have accrued enough visits, I may well look to signing up for Google adsense, but they tailor the advertising to the type of site. Most sites wanting ads just put a panel on their site saying advertise here for x amount, and if they are getting the hits the advertising follows.
http://johnashtone.com/
no, because although its a blog the site owner may not like it
Actually, I would.
However, I wouldn't deal with you because you spam. I don't do business with spammers.
If I were you give you the address to a web-based platform which would allow you to sell advertising space on your blog to companies and individuals all over the UK would you sign-up? Its free ;)