Gain of New Clipper from ROG

[armstrom]

In my attempts to better understand the principles behind designing effects pedals I have been analzying some of the schematics I come across... One that I find odd is the New Clipper on ROG... By my calculations (which are most likely wrong) The non-inverting opamp buffer's gain is set to 1001??? I'm not sure I understand  how that's useful.

So, if the gain of a non-inverting opamp is (R1 + R2)/R2 (or 1 + (R1/R2), take your pick ) looking at the schematic for the New Clipper it seems R1 = 150K (feedback resistor) and R2 = 150 ohms (resistor in low-pass filter to ground from negative input). so, (150,000 + 150) / 150 = 1001... Am I missing something here? Since this is a clipping distortion huge gain like this isn't required, right? If you look at the clipping circuit at the bottom of this page: http://www.generalguitargadgets.com/richardo/distortion/index.html  you can see he has a pot to control the gain  (in place of R1)  giving a gain range of 1 to 101.  This seems a bit more reasonable to me. What am I missing???
-Matt