My observation of a few codes.
I've had a ressie for a 2 wk midsize rental for a while using the Magic Visa code 87 even though everything I read elsewhere indicated it was for renting a car NOT in the US. Price was $383 and included all insurance. That same code now brings up a price in the $8000 range.

That just proves to me that it was NEVER intended for that code to working to rent a car IN the US WITH FULL COVERAGE.
Next, that same 2 wk midsize rental using the 57 or 67 codes come up as $266 with insurance included.
If you book a LEGITIMATE ressie using Emerald Code 5007125, its over $1200. Entertainment code is in $800 range.

I hate myself for even booking the 67 code but prices are insane even if you book with a valid code.