We have a referral program on Piwigo.com. The way it works is easy: when a new user subscribes with your referral code, then both of you get an extra month for free.
Each Piwigo.com account gets a referral code as soon as the subscription is confirmed. You can find this code on your screen [Administration > My Account > Referrals]
Get your referral code from your Piwigo.com account administration panel
Where does the new user enters your referral code? on his subscription management screen [Administration > My Account > Subscription]
Enter a referral code on your Piwigo.com subscription form
When the new user confirms his subscription, you receive a notification by email.
Piwigo.com notifies you by email when you get a new referred user
Did I forget to say that there was no limit on the number of referred users? It simply means that if you get enough of them you won’t pay any subscription renewal for a very long time! 10 referred users = 10 extra months for free, 20 referred users = 20 extra months for free…