I'm on Thortful!!
Just to let you know I have a few card designs listed on Thortful. I have bought cards from there before and been really happy with the quality, so really pleased to be giving it a go! It's just a few and mainly penguins of course! There are often deals for multiple purchases which you can mix and match from any of the designers
You can find me here - https://www.thortful.com/creator/bykateelford