You are apparently right as John Deere just agreed to a 3 year extension, they must be satisfied with how the tour is marketing the classic.
I understand that the players consider themselves as individual contractors, but it would have been nice had the tour implemented a requirement that the players had to attend every tournament once in a four or five year cycle. That is not an unreasonable requirement by any means.
When the tickets were a modest 15/20 dollars that was reasonable, but now the prices have skyrocketed to exceed from 60 to 120 dollars for ground and box seats. This past week the Memorial's tickets ran from 90 to 160 dollars, but there again the field was made up of mostly the top players of the PGA.
I hope that the Quad City faithful attend this years tournament, but watching last years event on CBS, it didn't appear that well attended.
It also doesn't help that the Classic doesn't provide bleachers with shade for us seniors. It was awful last year with the heat and moving the Classic to cooler months is not an option.