Excellent post on lifting the opt-in rate for push .. The opposite side of the spectrum is user annoyance and app abandons when these channels[specially push] are used to spam
Yeah, that's another post. This is just trying to get people to trust the app. Maintaining the trust is actually something else we've spent time on.
@bmull you might want to check out what we are doing in the space @http://www.informion.com - we are essentially using relevance as a key driver for engagement.