If you read the first post, the devs have pre-mined for givaways to get people started, and for donations to pools who setup and other things. Very little going to the devs themselves.
They have also been working tirelessly on updates and but fixes and worked for 8 months on the game everyone is playing for free and earning money from.
I'm not suggesting people with 2 or 3 coins should donate, but if you have banked a lot already then it would be a nice thing to do.
Of course if you want to be a tight-ass and only think about yourself then feel free.
Let everyone know your in game name so we can do some hunting