Hi @stonk99
I wrote this post a long time ago and when I wrote it you received a pack of cards after 100 missions.
Now you get a card when you complete 100 quests then 110, 120 and 130.
To receive cards you need to verify your account
I wrote a post to show how to do this ;)
@libertycrypto27/rising-star-free-cards-and-account-verification-carte-gratuite-e-la-verifica-dell-account-eng-ita