This is one of the simpler FAQs on Saabnet.com. Basically, if you get a license plate that says SAABNET on it, Saabnet.com will pay your fees for the plate for upto 4 years worth of fees upto a maximum of $100.
You'll need to provide a copy of documentation that you did actually register SAABNET and a photo of your car with the plate on it. It's pretty simple unless you live in a state that only allows six characters on a plate (I might be convinced to do something using TSN for states that only allow six characters [perhaps something like TSN900 or TSN9-5 etc]).
You can see an example of some SAABNET plates already in action here: SAABNET Vanity Plates Photo Gallery.
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