No trading cards for Humble version?

[Evo]

Got this is in a bundle, mainly because Walking Dead Saints and Sinners VR was in it. This game and Rad both list trading cards, but Steam reports I have no drops remaining? What gives? I've never had a game not drop its cards just because it was redeemed via key.

[[☭]-Soviet-Triumph-]

I can get 4 drops, dunno what caused this issue for you