This is NOT a coupon code, it is someone's Sam's Club membership number. The offer is found on the member services portion of Sam's Club web site, and they are expecting each person to use their OWN membership number. The form states "membership ID subject to verification."
This deal can be provided with the information that membership is required, but giving everyone somebody's membership number is WRONG. Plenty of Sam's Club members can take advantage of this offer honestly.
While very true this code has been used multiple times for a few different sample promotions dating back to 2007. So while they have the right to verify, it appears they don't as a common policy.
And yes using someone elses membership number is a little shady, however technically so is posting codes that are supposed to be used only once, but work multiple times or the practice of printing a one time coupon and using the back button to print it multiple times.
From a post i read, this may have been a generic number that was included on a Sam's Club form for free samples back in 2007.
I don't have access to that form, so I can't say for sure but this number has been circulated and used on the net as early as 2007 as far as I can tell.
I couldn't verify the "generic number" claim. Edited out the number from the deal description and updated the title to indicate the Sam's Club membership requirement