However, Grant spotted this nifty little detail on the side: a built-in card holder! Kinda cool, different, and WAY more welcome than finding unsolicited fliers stuck to my windshield.
I actually grabbed a card to see how well it worked. (Mildly damp, but still totally functional and no leaky/streaky ink problems.) And I called the business to see if they would give me the name of the vendor who set up this little card thingy — I just might try and fanagle one for my biz, too!
ETA: They cost $10 if you hunt for a deal, and I just affixed a red one to my car this afternoon. :)