What he is saying is not that far off. When Monsanto sells those seeds, they include a contractual obligation not to resell the offspring seeds for planting.

What he is saying is not that far off. When Monsanto sells those seeds, they include a contractual obligation not to resell the offspring seeds for planting. Whatever you feel about the validity of this contract, that's the current state of affairs. Monsanto also has patents on those seeds of the classical variety. That is, irrespective of their being genetically engineered. The work around was to sell those seeds as animal feed, purchase the feed in bulk, which is a mixture of seeds and then spray a large amount of herbicide on the crop until only the Monsanto seeds are left effectively creating copies. The offspring seeds of that crop are then sold as feed and the process is repeated. Monsanto argues that this is in effect making illegal copies of their patented seed even though the letter of the contract was not violated and that the feed sellers were infringing on their patents by selling the seed to be reused in plantings. It says all of this in the article you linked as well.