Its about referring people to banks who will apply for credit cards. The bank will inturn pay you referral bonuses. The trick is that you get paid even if your friends refer their friends.
Say, you refer 5 of your friends and each of your friend also refers 5 people.

You can make lot of money at each level.
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levels | Description | Referrals | Money You Earn Per Referral | Money You Earn
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Level 1 | Referred by you | 5 | $10.00 | $50.00
Level 2 | Referred by level 1 | 25 | $2.00 | $50.00
Level 3 | Referred by level 2 | 125 | $2.00 | $250.00
Level 4 | Referred by level 3 | 625 | $2.00 | $1, 250.00
Level 5 | Referred by level 4 | 3125 | $5.00 | $15,625.00
Level 6 | Referred by level 5 | 15625 | $2.00 | $31, 250.00
Level 7 | Referred by level 6 | 78125 | $2.00 | $156,250.00
Level 8 | Referred by level 7 | 390625 | $2.00 | $781, 250.00
Level 9 | Referred by level 8 | 1953125 | $2.00 | $3,906,250.00
Level 10| Referred by level 9 | 9765625 | $2.00 | $19,531, 250.00
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|Totals 12207030 | $24,423,475.00 Total
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You can refer any number of people you desire. Its really easy.
Checkout following url: Click Here