I've been doing a lot of marketing research these days. (Including web seminars and every strange techno medium.) In part I find it so much easier to promote other's work than my own and I want to streamline the process.
It is a process, not a character flaw. I keep reminding myself. Marketing is not a sin. It's just getting the right stuff to the right people. (Just the word marketing gives my anticapitalist soul a rash.)
I have signed up for a few (too many) things. I tend to be a bit of an early adopter. Likewise an early abandoner. But I love to get in early while I can grab "MORRISON" as a username.
Writers! We should be creative and brilliant at self-promotion... but we tend to hide our books in caves like a geo-caching prize. Only the truly deserving, the devout readers, will ferret it out and find them/us.