So here's what happens:
Farmers have little choice but to use these seeds. Once they do, they have to come back to Monsanto for more because A) the powerful herbicide has basically killed everything in its path and B) it is illegal to save seeds and use them again. Not to mention Monsanto's Roundup Ready corn crops and herbicide resistant soybean crops have disrupted the agricultural system - causing soil erosion, nitrate leeching, and water contamination.
Why bring this up today, you ask? Because of a recent broadcast on NPR about how seed licensing continues to screw farmers. Read the transcript here or listen to it here. Very uncool, Monsanto (Dupont, Syngenta, and Groupe Limagrain).