I object to his suggestion you should always take blind intros for coffee, and it's not because i'm full of myself, it's because I'm pragmatic.

In business, this is how a lot of business is done aka "I know a guy who you might want to connect with". I gather most BDs will have experience in this during their career, after all BDs are their to entertain and develop new business.

However from what I am reading, the problem was with the persons response, e.g. the email response with a link to a tech blog, what happened to the old "Sorry I am not interested" response or "Ok I will give them a call".