Geocities versus FarceBook
"I for the life of me can't figure out what is so good about these sites. Twatter is basically dumbed down IRC, instacracker is basically sending a picture, FaceB0rk is basically a webpage that uses frames...I mean WTF is so cutting edge about all this?"
Those of us who've been around long enough will recall the abomination that was Geocities.
FaceB0rk relieves us of the visual abomination of Geocities, adds lots of useful functionality (and lots of it is useful, especially in closed group environments), and provides a generic and reasonably satisfactory standard delivery vehicle for everyone's content - all at the cost of being bombarded with "targetted" advertising and being tracked whether we like it or not.
Now, whether everyone's content is "worth" delivering at all, is a different question, but what is really not in dispute, is that FB has developed a pretty good system of uniformly delivering user content on a massive scale - and it is popular, whether we like it or not (and the bogus FB metric aside, lots of people are active).
There are no free lunches, and at some point, advertisers might begin to value FB impressions differently, with interesting outcomes to follow.