If this doesn't sound like some protection racket, I don't know what does.
"Don Karlin, I didn't expect you so early this month!"
"It would be a bad thing if the May flowers didn't show up for your April showers, if ya get my drift."
"Of course, of course, I'll 'buy' all your seeds. Here, is that enough?"
"It coitinly is. Now I shall be able to win that wonderful pony. Thanks, and I'll be back...next month."
Hmm, wonder if this would work today?