Premium Processing Fee question

Hope this is the right board......

I was just checking the correct fees and came across a $1000 charge for a "premium processing fee" and wondered if you guys knew who gets to use that service ? I figured if anyone knew, you guys would!

http://uscis.gov/graphics/publicaffairs/newsrels/USCISFeeStructure.pdf

Just curious!
Sheril

http://uscis.gov/graphics/formsfee/forms/i-907.htm

Employers may use this form to request faster processing of certain employment-based petitions. Currently, those eligible to request this service are the following categories of nonimmigrants whose employers file on their behalf using Form I-129: E-1; E-2; H-1B; H-2B; H-3; L-1; O-1; O-2; P-1; P-3; Q-1; TN and R.

Had I carried on reading .....

Thanks Sarah- talk about, always but always on the ball !

Sheril