Its simple - existing ProHosting customers who refer a new customer to ProHosting will receive one FREE month of hosting service.

Member Referral Program Details:

• You must be an existing ProHosting customer to enroll in the Member Referral Program.
  
• You must have already paid for at least one month's of Web hosting service with ProHosting in order to qualify for the Member Referral Program.
  
• Free month(s) credit applies only to customer's base hosting plan (does not apply to additional paid services).
  
• If you have more than one domain with ProHosting, the free month will apply to only one of the domains.
  
• You may refer an unlimited number of customers to ProHosting and will receive one free month of hosting service for each new customer that you refer.
  
• The referred customer must remain a ProHosting customer for at least three months in order for you to receive your free month of Web hosting.

So, start referring friends now for ProHosting's Member Referral Program and start earning your FREE months of Web hosting.