I was curious about them also. I looked through the site awhile back and just rechecked. Not sure what you saw for commission, but I saw 20 cents per 1000 shs.. Is that a real number? The last time I looked i thought they had that number posted in one spot and on another it was 20 cents per 100. I think it related to your cut and whether you ate your losses. I was also curious why they don't mention series 7. I didn't bother calling, as I had a bad feeling, but maybe worth a call.