[Retric]

Monoculture of very fast growing trees let’s them maximize the value per acre when sold as carbon indulgences. Actual impact is much lower, but by then they have moved to the next project.

That said, in areas that got deforested having any tree cover can make the area much more habitable for other trees. Thus single digit survival rates can still result in new forest over a few decades.

[tomrod]

The economic topic you're hinting at is externality. There is also the notion of Goodhart's Law, where any (single dimensional) measure gets gamed.