Shardmoon is new, and the first players get a head start: the first 100 players who create an account and confirm their email address receive 1000 Silver. That is enough for several card packs or a cosmetic from the shop. The home page shows how many places are left.
Bring friends along: share your invite link from the gift button in the main menu. When a friend you invited reaches level 3, you both get 200 Silver.