If you are looking to expand your earning, try a down line builder. Down line Builders are one of the fastest ways to increase the amount of referrals on any affiliate site.
1. SimpleRefs
2. ProgramRefs
3. TargetRefs
4. GetRefs
5. DownlineBuzz
6. BuildMyDownline
To maximize your earning, I suggest that you promote the same referral link on multiple down line builders.