Thanks for the comment. Can't say I agree with not using links, I've not seen any evidence of Twitter users not wanting to see/click links? Can you back that up? On the poster thought, I kind of like the idea, but only as part of a mix of tweets and only if the poster is of a high quality. This could also be a very time-consuming practice. Are you seeing many people/brands etc doing this for blog posts? I also think it adds an uneccesary step for the user via an extra click (depending on their Twitter client).
On the ad front, I wouldn't advise spending budget driving people to your blog posts, unless that post is going to create a lead etc for the business. A lot of money could go down the drain in the attempt to just drive extra traffic - what is that traffic actually achieving.
I stand by my advise of short, sharp and informative tweets that make the user quickly understand what they will get from clicking a link, and reading the post etc it leads to.