Pretty sure it's so you can't collect the newly produced seeds and sell them on the black market to people next season. Basically what you said, but it's not just about preventing people from 're-using' what they bought, but also preventing them from providing it to others.
Pretty sure it's so you can't collect the newly produced seeds and sell them on the black market to people next season. Basically what you said, but it's not just about preventing people from 're-using' what they bought, but also preventing them from providing it to others.