I wish we could too, but instead we rely on the time honored approach of charging our customers directly for our services, rather than trying to monetize with advertising or selling your data. We do offer 2GB for free for life though. Thanks for your interest regardless!
I used spideroak for a year (paid) and slowly grew to hate the client. Everthing else about the service was great and I had a large amount of trust in the company, but the client was extremely slow and unpredictable.
I wish Dropbox and SpiderOak would mate and have a child product that was as smooth, fast and easy to use as Dropbox, but with full SpiderOak grade client side encryption.
