I like the idea of the two modes. From what I observe, most people don't really care about privacy, but the ones who do can be quite, errr, passionate about it

I like the idea of the two modes. From what I observe, most people don't really care about privacy, but the ones who do can be quite, errr, passionate about it, certainly sometimes to the point that nothing is good enough. So it's a difficult market. I worked at a privacy focused cryptographic startup a few years back. It didn't succeed... At the end of the day, I think you have to differentiate on the strength of the product itself, with privacy being a very nice thing on top of it to the best extent possible.