There are a lot of very smart women (they're most women) running these couponing sites. I've started reading some of their blogs in the past year. The mentality often reminds me of the "gamer" techniques of flyertalkers! It must attract the same type of personality types.
That said, these gals are pretty much playing for small potatoes. Like if you play the game, you can score some free instant potatoes, cheap crescent rolls, and maybe make a buck or two on body wash you don't really need. Playing their deals well might save a savvy shopper an extra $100/month. Compare that to snagging a $200 transatlantic ticket and you can see why I think this is small potatoes. It won't change your life. You won't be jetting off to exotic locales and staying in fancy hotels that you otherwise couldn't/wouldn't afford.
The "super couponing" technique basically involves following the weekly supermarket/discount store/pharmacy ads and then using coupons on these prices to save even more money. I think many of us -- particularly in areas where the markets price in "high-low" fashion (most goods are overpriced, but they run frequent half-price sales) follow the weekly ads and stock up when things are on sale. We also use a coupon if we happen to have one from the Sunday paper. Well, these women take that to the "extreme," benefited greatly by the explosion in online coupon deals.
I do think these sites are worth visiting for their coupon match-ups and links to the online coupons. I have a couple of favorites that I try to look at a couple times a week (some of the best online-coupons usually last only a day or two). I probably save an extra $20 a week doing so. As a gamer, it makes me happy saving an extra buck. But unless you have that personality, you'll probably be bored and lose interest.
Here are two sites I recommend -- for both their content and for their minimal extraneous chit-chat (i.e., not much sharing of baby and dog pictures):
http://thekrazycouponlady.com/
http://www.livingrichwithcoupons.com/