300.000.000.000 ... PIXEL Yasuní
If you know this ... http://www.milliondollarhomepage.com/ ... is the same ... maybe works also this time.

Solution

Divide the engendered part of the forest in a reasonable number (regarding the dimension and price) of pixels(squares)  ... and sell them whithout the right of usage ... sound weird but some guys are buying land on moon so why not at Yasuni.

( I hope that I managed to figure out what is the endangered part of the forest ... please forgive my ignorance)