I think they are not greedy, they just try to find a way how to get interest of people in cryptocurrency by following the trend.
Although the method is not quite right, maybe it has got some attentions of investors which is better than got nothing.
To get people interested in cryptocurrency, it is enough to create a good and popular project. However, many developers collect money at the beginning on their promises, and most often they do not create anything. Did Nakamoto raise money to create Bitcoin? That is why everyone respects him, and does not like greedy developers.