Natty asked: Why is my introduction worth $100? - Explain to me like I am 12 please.
I've been asking myself this question. We might have all been asking this question. This is a good question.
Introduction
No matter what these reasons are I think it, unwittingly or not, makes up for a good marketing scheme and it's also a good participation incentive.
Here is one reason why introduction post are worth $100. Every steemian is incentivized to vote because voting also rewards the voters and right now voting on introduction post is hot and this potentially means high reward. It's a virtuous cycle.
Here are some more thoughts from 
Your introductory piece may be worth a $100 bucks to the network at this moment. If you were to write this once there are 10,000 piece of content being published every day then it would probably be much harder to get $100 for it. But beta is beta and the voting power hasn't been distributed yet to a large enough crowd...so a few whale voting you up moves to needle fast! After July 4th, on the payday of "Independence Day" things will change a bit on that front.
Gotta strike gold hard when you realize you have a first mover advantage. ;-)
That being said I would encourage people to post proof of their identify if they feel like it. People in general will be a lot more willing to upvote introduction post with identity proof. I know this because I did post an identity proof after 
Conclusion
We're about to get some feedback. I just posted my identity proof post on my facebook feed without any comment or explanation as to what it is. I'll probably post it on my facebook page tomorrow to get even more views and possibly reactions. I'll probably post it on some bitcoin facebook groups where I have already post about steemit before. Afterward I might post some clarifications or other steemit post to see how people react.
References
[1] 
[2] My introduction post
[3] My proof of identity post