Why create something from scratch if you can buy a ready-made startup? Capitalization of the same Greencoin today is just a penny for Greenpeace. It seems to me that it is easier for them to buy ready-made than to develop their own.
Usually, large corporations do just that - choose a promising startup and buy it. It is cheaper and more promising than creating something of your own.
To be honest, I dont know many of startups in a sphere of environmental products. So there is definitely a need to create something worthwhile