sorry, but I feel like I have been living under a rock those last couple of years. what happened to the swapbots where partner, premium, and public merchants were able to buy game assets? I can't find the website anymore.
I think swapbots were not working good enough when mempool gets full and they abandoned using them. Team is now doing public sales straight on markets (usually announced on twitter). If you have merchant account you could contact team and ask how to get cards for resale.
Swap bot service closed because of to little use. It was few months ago. Who had cards and coins on their swap bots had to empty them.