Mate, go back and read the answers to your questions, it can't be that hard instead of just spewing negativity every time an answer has been given to you.
The devs keep 20 million coins, NOT the unsold coins from the ICO. They go into a pool to increase the incentive for people doing the mobile mining experience, and so that the devs can keep the flow going for those people choosing to use that experience.

So no, the devs are NOT greedy, and they have answered your questions.
The hard cap of $40 million dollars was introduced after it was needed; it wasn't in place when they wrote the whitepaper, but was decided later on.
Can you tell me the difference between a plan to $40 million+ vs. a plan to $40 million tops? The plan is still the same, and they can with $40 million tops do the exact same they can with $40 million+, instead of just setting a no limit boundary, they actually set one.

I really beg you to actually read the answers people are giving you instead of just jumping to conclusions, spreading all sorts of unsubstiantiated claims.