nomis5 - 6:24 pm on Sep 18, 2008 (gmt 0)

Martini, That's the best explanation I've heard for a long time and so thriftily expressed.

And if you're right, then when I change something on a site, possibly insignificant, it may just open up a new market of advertisers. Hence the earnings suddenly jump. Maybe the changes needed to open up new markets are cumulative and the one that causes the earnings to jump is the one that "broke the camel's back".

You've convinced me!