Finding info on sales practices of a specific company isn't easy!
One place where you can sometimes find surprising amounts of detail on a company are in the 10-K reports filed each year with the SEC.
The 10-Q has less detail, but you might find updated revenue figures in the 10-Q.
SEC Filings
Why might info in an SEC Filing be more reliable than info in some other sources?
Advantage?
Disadvantage?