As the viewers are all website owners or affiliates, it is possible that some might find certain member sites interesting and thus make note of them on their own sites, sending more traffic their way. Most traffic programs also impose a time limit when members are browsing, ranging from 10 seconds to 60 seconds. Some incorporate the use of captcha to ensure user interaction.
Almost all traffic exchange programs are free, although many of them offer special features to paid members and offer credits for purchase. Almost all traffic exchange programs encourage users to build their own referral networks, which in turn increases the referrers' amount of credits.