A successful invitation is a newly registered user who arrives from your unique link and completes the first credit upload on the site. After their registration, every visitor who arrived from your link will receive extra credits in addition to their first upload, just like you.

In detail
2500 credits + 300 credit bonus (300 credits commissioned for you)
5000 credits + 500 credit bonus (500 credits commissioned for you)
10,000 credits or more + 1,000 credit bonus (1,000 credits commissioned for you)

To prevent the misuse and abuse of this function, for a valid top-up, we only accept new bank card payments, more precisely ones that have not yet been used in our system before.