Ha! Thanks -- love that you're asking to pay for it. For now our custom S3 support is a gift. In the future we may change that (and grandfather folks in). In any case, thanks for being a fan.
That's kind of the point of this thread, in fact. If you don't charge enough, then you won't survive, and your users lose. I would be uneasy using an important service without paying for it (but I do like the idea of my data living in my own s3 bucket).
Like I said, as we take another look at pricing (we are in the middle of it now) we will think about what to do on a more formal level.
Thanks for the feedback.