It took a bit of time but cards are now approved and should be dropping.
I'm still tweaking and adding levels to SiNKR 2. I plan to backport some of the enhancements to SiNKR and add a small free level pack with a new mechanic to the original SiNKR that should come out in a couple of weeks.
https://store.steampowered.com/app/973220/SiNKR_2/