On-line marketplace for sellers and buyers of gift cards, in-store credit vouchers and marketing incentives in the nature of gift certificates, coupons and rebate vouchers; on-line trading services, namely, operating on-line marketplaces for sellers and buyers of goods and services; providing a searchable on-line advertising guide featuring the goods and services of on-line vendors; providing a searchable on-line commercial evaluation database for buyers and sellers; advertising and advertisement services for others; on-line service for connecting social network users with retailers for the purpose of facilitating discounted purchases of in-store credit vouchers, gift cards and other marketing and loyalty premiums in the nature of gift certificates, coupons and rebate vouchers; promoting the goods of others, namely, providing information regarding discounts, coupons, rebates, vouchers and special offers for the goods of others; promoting the goods and services of others by providing hypertext links to the websites of others; promoting the goods and services of others by providing a website featuring links to the on-line retail websites of others