Recently i discovered a bug where my cards froze on the screen but i could still use them which made me get up to like 10 million in gains. I do not know how i made it happen but just know it was how i got Absolute Unit with the Leg-end deck. Hope this comment helps with development and bugs.
Same happened to me. The seed is 1PER3GK. Cards wouldn't be discarded after using them. This specific run was a Twerk Build, with In the Zone and Arms+Meditate, to get a lot of draw+card spam. Also got the weird, Arms card, which has the description "test description mechanic".