did you read any of it then?
I purchased a Viewer Pass. How do I earn Souvenir Packages?
You can redeem a Souvenir Package each time you upgrade your Event Coin. Event Coins can be upgraded three times total during a Major, from Bronze to Silver, Gold, and Diamond.
To upgrade your Event Coin you must complete challenges like watching matches live and making correct picks in your Pick'Em Challenge. All challenges are shown in-game by locating your Event Coin in your CS:GO Inventory, clicking on it and selecting 'View Coin Challenges'.