Many companies offer listed in Best Money's catalog affiliate programs. You can reference links!
These sites offer their members special affiliate (referral) link.
Visitors referred thru that link are tracked and referrer is rewarded.
Paid most commonly referrer% is spent some of the money and / or earned through his / her recommendations.
Example: Program offers a 10% referral bonus and 100 people visit through your referral link ...
Some visitors would join and actively ... in the case of your referrals spend $ 100 total, you earn $ 10.
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If you wish, you can use bestemoneys.com to simultaneously advertise multiple referral links