The premise behind intro isn't a bad one. The employees (technical) who built it were excited about finding a way round Apple's very limiting system. I don't think subscribing to a particular view of corporate ethics is related to your technical skills. The scores of highly technical people working in the defense and finance industries is testament to that.

As a fairly technical person, I think Intro is a fairly neat product. There's definitely some implementation issues that mean that I'm not going to use it (I don't really want a linkedin advert in all my outgoing email), but I'd imagine it'd be pretty useful for some people. I already trust one large corporation with my email despite the fact I know they don't have my best interests at heart. Adding another one wouldn't be a deal breaker.