I think the idea is that, if I like what he has to say, I'll just do it. He doesn't have to ask, and doing so _inside_ the post shifts the whole thing from inspirational anecdote, to well-written justification of why you should follow his Twitter.

Fair enough.

The way he embedded the suggestion seemed contrived and inorganic to me. If some one puts a link to their Twitter account beneath a post, I know what to do if I want to follow them because of their output.

If I have confidence in my output I will trust my audience to find the right degree of involvement they want to have with me. No need to push it. Maybe I'm weird that way, but I think the OP knew exactly what he was doing, and stuff like that rubs me the wrong way because I find it undignified, harshly put.