Memorize the 10 Commandments and Win $20K?

Here's an interesting take on learning the 10 Commandments I read over at Todd Rhoades' blog Monday Morning Insights:

Darrel Rundus is distressed that Americans readily can tick off a list of 10 stores, 10 sports teams – even 10 beers, but there's a collective "Uhmmm" when those same people are asked to cite the Ten Commandments. To change that, he said, he and his wife decided to do "something a little crazy." They are taking $20,000 of their own money and posting it as a prize that either will be dispatched via casher's check or wire transfer to the first person who, on Monday, Oct. 26, answers his random telephone calls and can recite the Ten Commandments in order in 20 seconds or less.

Here's the promo video - then a couple of questions:




First off, I like the idea and I think the video is well done and makes a good point. But, if we live under grace, what is the value in learning the Law? (Hint: Romans 3:20; Galatians 3:24)

Secondly, do ploys like this serve the cause of Christ well? Or does it cheapen the gospel?

BTW, I've registered and I hope he calls me 'cause I'm READY!