Is there any whitepaper to describe the SP increase equation in the numbers ?

If market supply and demand curves do not match then it will affect btc price.
Demand is speculative only. I would imagine that steem token give some rights to blog.
But I think that the value of token is the time of people which spent writing/reading content.
Now it is wild wild west or ponzi scheme. Problem is that gives no clear view how to montezie this time. I think that true value will be added when people start to put marketing content stealthily in funny way like sponsored advertorial. It could be incentive for companies to have most views.
The future is rather bright if they do not screw the distribution of coins too much.