We’ve always taken data security extremely seriously. And we’ve long believed that everything you store in your browser belongs to you — which is why we’ll never sell your data, or willingly compromise your privacy

From the (older) interview you linked: 'The aim is to earn a dollar per year per user. "We're almost there," he says. "I think we can do more than that and still be nice guys and not sell out our users or do anything silly."' That's hardly cast-iron, especially considering that Opera did indeed sell out eventually (yeah I know that "it was complicated", but that's basically what it boiled down to). But hey, in the end, trust is individual, so more power to them. I just think their impact on the web at large will never be as significant as Mozilla's, if they continue on this track.