There are many advantages to becoming a Clickbank affiliate. First, the commissions you can earn by promoting Clickbank products is generally very high compared to other affiliate networks (50% or more). Most of the poplar Clickbank products also convert quite well, thanks to the professionally written sales pages most of them have. Another advantage is the fact that Clickbank actually shows you which products are selling. Just visit the Marketplace section of their site and you will see their products ranked according to popularity. This is incredibly helpful for affiliates as it removes much of the guesswork.