You will get a message to confirm the credits or licenses won in the Campaign.
Scenario: (1x3E + 1x5E + 1x1E + 1x31E) =40$(2x20) so 2 winners 5E donation will be rewarded with 10E credit 31E donation will be rewarded with 62E credit.
Scenario is just an exemple, the max donation amount is 5$!!!
Don't use your money on donations, try to use them to save yourself time