For Californian's, there's also the 11-99 foundation[0] which will provide you with a license plate frame for donating $3,000 or more. The foundation ostensibly exists "to provide emergency benefits and assistance to California Highway Patrol employees and their families and scholarships to their children."

It's an open secret that the license plate frames make it much less likely to get pulled over for speeding by California Highway Patrol.

[0]https://chp11-99.org/membership/