Well, after some research, I might agree with Lauda. Deep Onion dev is not very transparent, 20% for promotion is too much, way too much. 10% for dev is also very very big amount.
Byteball dev leaves 1% for himself and there's very big development going on with the code, releases etc, just to compare.
Maybe 20% for marketing promotion is too much, but it depends on how deep onion dev do it.
And according to your theory, byteball 1% for dev is greedy too, Signatum 0% premined.
We can't really comment a coin on how much dev wanted to have.