Yes. Some Private Beta players will receive one free Silver card and/or a Gold Doom Shroom or Gold Starfield card for their contribution. The amount of each of these Gold cards will be capped at 800.
Horizon will also populate the Skyweaver Market one time with 20 Silvers per card. This initial seeding ensures that the Skyweaver Market is functional—and that players can buy and sell Silver cards—from the moment the Market goes live.