Imagine you’re going to a bar with friends.
Two days later you’re getting a phone call: “Hey [first_name]! we haven’t seen you for a while, how about coming for a visit?”, 2 days after that you might get this call: “Hey [first_name]! your friend [facebook_friend_name] was here today and really enjoyed, why don’t you come back?”. you might be sick of this cold calling by now, but be sure that two days later you’ll get another call: “Hey [first_name]! last time you we’re here you drank [whiskey], people who like that also like [vodka]! come by and give it a try!”.
This is of coures not some kind of a future vision – this is pretty much my life, and I’m sure your life as well.
Why? because most startups allow them selves to act like an obsessive girlfriend just because they have my e-mail address, or even worst – access to send me push notifications.