I like you, and I like your service. I especially like that your service is clearly designed to be a successful operating business rather than a 'sell it to google' startup. I wish you much success.
It's pure selfishness, really. I use Tarsnap, and lots of my friends do too. If I sold Tarsnap and ran, I wouldn't have good backups any more, and I would have a lot of ex-friends upset with me for not taking better care of their backups. :-)