I have no idea how one goes about 'monetizing' a blog. Most of what I read sounds like pyramid schemes, multi-level marketing, chain letters, etc. Not something I want to get involved in.
I guess if I could find some content that I thought might actually appeal to a wider audience then I would feel OK about attempting it. I suspect my own interests remain too obscure.
Anyway, for now I decided to set up a new blog which would work as a nodal point for all my scattered material. I won't completely stop posting to the specialized ones, but I think it might be time for a new 'generalist' blog.
I have set up Time Piece (it may still change its name) as a place where I can have links out to all the old experiments, defunct blogs, bits and pieces scattered about - for my own convenience - and try out the new Blogger interface (who knew that Blogger had such a small share of the market place now?)