You act like there is only one entity in this market. That is hardly the case. There are other agritech companies that develop their own lines of seeds, both GE and non-GE.
Name 3 that are big enough to compete on price.
If you had read my reply properly you would know that your answer and this question above are completely unnecessary.
See, Monsanto is already so big that they can just buy anyone or just outcompete them with price if they should become a threat.
Or they will do what Google and Apple are doing, decide there is enough room for two or three to set the same price for everything.
Does that matter? Is a duopoly really better than a monopoly? Of course not.
Then comes the big catch, only one already has pretty much all of the market and will have it for all forseeable future because to change brings a MASSIVE cost.