Meh, aren't you now assuming that if I follow you as a microblogger, then I also want to know about all other stuff you do, which is not necessarily the case?
Discussion
All the 3 solutions in the post assume this. And I agree it's not the case all the time, that's why solution-c at least gives the microblogger the option to not talk about his other stuff in his microblog, if he is aware of the fact that the people following him might not be interested. Not all people who have podcasts also send a note on X.com about their latest podcast episode every time.
After reading your article again I tend to agree. And as you pointed out the writer can choose what other stuff to talk about.
And the reader can choose to filter out too.