Multi-layer surveying systems and methods with multi-layer incentives

A computer readable medium having stored thereon a sequence of instructions which, when executed by a processor, cause the processor to perform functions comprising:

• receiving first identification information of a first user;
• receiving second identification information of a second user, the second user being referred to the processor by the first user;
• analyzing the second identification information;
• determining whether to receive second user data based on the analysis of the second identification information;
• and
• rewarding the first user an initial amount if the second user data is received, the medium further comprising instructions which, when executed by the processor, cause the processor to:
• receive subsequent second user data;
• and
• reward the first user a second amount.

A method of collecting data, comprising:

• providing at least one first user an incentive to provide second identification information of a second user;
• analyzing the second identification information to determine whether the second user is a member of a target group;
• providing the second user the incentive to provide third identification information of a third user;
• analyzing the third identification information to determine whether the third user is a member of a second target group;
• and
• rewarding the at least one first user and the second user if the third user is a member of the second target group and the third user provides third user data.