I appreciate your idea, but I really don't see a viable business model in this. The biggest cause of deforestation (at least in South America) is clearing land for livestock. Quite often they even use the slash and burn method, which is the cheapest way to clear a forest and it also makes the grass grow on much faster pace on top of the land.

I think you should look at sustainable economical forest management, which is used in all forests at least in Nordic countries. Finland and Sweden have the biggest biomass industries in Europe, yet their net forest growth has been positive almost the entire century! This I think is a viable solution, that would be greatly appreciated in developing countries where everyone benefits. The forests will be saved and there is still a profitable business in owning a forest.
What ECO should do is educate people in developing countries of sustainable forest management and try to connect investors in the biomass industry to local forest owners.