This article is from 2007, but I assume the situation has only gotten more ridiculous since then.
San Francisco began its corporate program in 1998. The intent was twofold: help companies doing regular business in San Francisco manage their tickets, and streamline the collection process, said Maggie Lynch, spokeswoman for the MTA.
Companies can enroll if they have at least 20 vehicles that park on city streets and if they have what Lynch described as "a history of citations." The participating firms are billed monthly and cannot protest the tickets. In return, they avoid late fees and having their vehicles clamped with immobilizing boots when a vehicle accrues five or more parking tickets.
"Drivers used to hide their citations from management, so companies would not know of a problem until vehicles were booted or towed," Lynch said. [...]
Delivery companies enrolled in the program are the biggest parking violators, accruing almost $1.3 million in fines. [...]
"I get tickets all the time, probably three or four a week," said Gonzalez, who has 10 years on the job.
Most of his tickets are for double parking. On the Bryant Street run, a passenger car was parked in front of the building where Gonzalez was making a delivery. There were a number of empty metered spaces on the block, but Gonzalez said it would have taken too much time to squeeze his truck into one of them. [...]
"This is part of the price of doing business," said Jim McCluskey, a spokesman for FedEx, which paid San Francisco $434,046 for 7,711 tickets [in 2006]. "We encourage our operators to park legally, but we also need to meet the needs of our customers who want reliable, on-time service."