I mean, the knowledge that Campbell's invested in agriculture research and went as far as breeding its own varieties of tomatoes is not really common knowledge.

I mean, the knowledge that Campbell's invested in agriculture research and went as far as breeding its own varieties of tomatoes is not really common knowledge. So in that sense it is a bit of a thing to have the Campbell's seeds, since they were never sold for other people to grow on their own. Tomatoes are a very easy plant to grow, which explains the prevalence.