There are 2 ways to participate in the campaign.
If you already have a moey! account go to Settings > Invite friends and share your code with your friends.
If you don’t have a moey! account, you need to open the account through a code sent by a moey! client and register in the campaign page. After activating the code you have to open the account in 30 days. After that you have 30 days to complete the required payment.