The Cohhilition

https://www.blinkbundle.com/
Game has 4 trading cards they are adding 7k more keys tomorrow
Need twitter and facebook quite a few hoops for this game
it is on the bottom of the page

Bonzai told me about another one Canyon Capers if you have any children and/or want free steam cards this game is well free
https://www.indiegala.com/giveaways