Double Fine released a simple chart, giving a rough outline of how much money is going where. They had to spend around $1 million on Kickstarter and Amazon fees, along with all the various rewards and shipping costs.
It will likely be the same with Project Eternity. People keep talking about what can be done with $4.1 million. The truth is the actually figure Obsidian will be left with after rewards and fees is likely to be around $3 million. People are going to need to know that, else they will be asking where all the money went...