Hard times are good times for coupon sites. Compete recently released a list of the Top 10 coupon and deal sites that reflects how penny-pinching consumers are looking for more bargains these days. Top-ranked Coupons.com showed a 17 percent rise in visitors to 11.6 million during May from the year-ago level. The biggest gains were at No. 3-ranked RetailMeNot.com, which recorded a 195 percent jump to 6.4 million, and at No. 10-ranked CouponMom.com, whose visitors more than doubled to 1.5 million.