Interesting graph plotting followers vs Tweet volume. Looks like there are three clear phases: 1) use it to tweet a “what is this for” message and then nothing, 2) put a few updates a day on (from a blog maybe) and 3) a fairly steady ramp up after 800 followers. It looks tantalisingly like it steadies off at about 10 per day, but that’s not scientific in the slightest. PS in the comments, it’s clear to see that the old waz business model is still working (summary: send a market share table to people that’s slightly guesswork and have them respond with anger giving the correct numbers).