To answer my own question, I found this in another thread.  I think the rate of 29.7 looks accurate doesn't it?

"New Commission Chart
For new Pay As You Go purchases we pay contributors 30% of the US dollar price. For purchases made using credits we pay $0.50 USD for each credit spent, just like before. This also applies to Extended Licenses. Here is a detailed breakdown of how much you will earn with each type of purchase (all values in USD):
                               Pay as You Go               Credits (just like before)
Small                       $0.90                           $0.50
Medium                    $1.50                           $1.00
Large                       $2.70                           $2.00
X-Large                    $3.90                           $3.00
Vector                      $3.90                           $3.00
Extended License       $29.70                         $25.00 "

Another more for less scheme? What's your take on this?

I am okay with the price.  $100 is what I charge for an EL on my own site.  But the split is another issue. 

I don't see why we should only be getting 25% of an EL sale and BigStock keeps 75%.