Indeed, we’re working directly with game developers and/or publishers - and in some cases even more parties that are involved!
We discuss terms of the deal (e.g. the date / price / anything else), trying to make sure that we’re able to come up with an amazing deal for you guys. We always try to avoid featuring 7 racing games in a row and stuff like that, so sometimes it can become a cool puzzle to solve. 
After we came to an agreement we receive the Steam keys of the games we’re featuring. After all that stuff has been locked-in we’ll handle the promotion part and distribution part and split the revenue it with all the companies that were involved. (The developer and/or publisher, but also the influencers that were featuring the game.)
For the games we’re featuring in the coin shop we directly purchase the game keys from the developers/publishers.
Any other questions? 