To all the people saying some variant of "there's nothing new here", I think you are missing it: Tipping has always been an effort. If it all happened behind th

To all the people saying some variant of "there's nothing new here", I think you are missing it: Tipping has always been an effort. If it all happened behind the scenes, with no action required on your part (beyond just browsing to a site), then "tipping" can viably compete with ads.