Stamps
Utilizing the same method the postal service has for charging its customers to send mail, RelationshipNetwork requires respondents to purchase stamps to send email to advertisers or to listen to the RealAudio voice introductions of advertisers. The stamps, which can be bought one at a time or by the book or roll, are available online at the RelationshipNetwork "post office. "

Studies have revealed that stamp sales do not cannibalize traditional voice personals business. Rather, stamp sales have been shown to increase overall personals revenue by tapping a whole new market through the Internet.