I think a "oh that's getting boring, here is other awesome stuff that may surprise you" suggestion engine would get on my nerves (psychological) or just make me

I think a "oh that's getting boring, here is other awesome stuff that may surprise you" suggestion engine would get on my nerves (psychological) or just make me pee my pants (physiological). The Holy Grail is Just In Time or Contextual purchases. The opportunity to buy something when your need is greatest. Calendar app which advertises to you based on your activities. Or the Amazon Dash. The problem is pretty much all advertising is corruptible and becomes evil. I press your Dash button when you aren't looking.