Leads Leap is more than a traffic exchange, it provides several tools for internet marketers as I outline in the video. You can read about the site before you even join to get a idea of what they offer.
There is one upgrade, and you get 10 ad slots to have your ads shown instead of having to accumutate credits. It is about $26 per month. The OTO get you in at less than $20 per month. They give you 24 hours after joining to decide.