That said, the FAQ mentions that the for-profit model is designed to avoid ads in the client and to "take a strong stance on privacy", which is a little bit disingenuous given that the client exclusively relies on an email service provided by the world's largest advertiser and email data miner.
Yes, Mimestream itself isn't using my data, but there's a bit of induced cognitive dissonance in taking a strong privacy stance for a Google-specific product.