See my post above. It is absolutely true.
Sorry to doubt your mate but I'd say that's total bollox.
I was the Marketing Director for the main shirt sponsor of a PL team and it as a key promotional channel for us .... we didn't get anything like that and nor did the lesser sponsors, who mostly had boxes and then a few prime seats. It as 10 years ago so maybe times have changed but not to that extent ... plus who are all these sponsors
Nor does it answer the loads of seats in WSU/ESU/WSL/ESL etc that are not appearing