BT has a 30second timer (auto) and a 10second timer (manual). It's very stable!
Free Users* 100 tokens / month
* 4:3 auto surf ratio
* 1:1 manual surf ratio
* 4 levels of referrals
* 10 sites, 10 banners
* Link banners to sites!
* Ads: 0.75 / unique hit
http://www.breedtraffic.com/Surf/ReferInline.php?ID=1549
