I think that it is mostly that it does not meet the Butterscotch Shenanigans' fabulousness level (I made that up right now).
Basically the bros have their well-polished, finished games on the markets. Less polished games either never made it to stores or were put away because if someone discovers Bscotch through unpolished games, they'd go "Oh those devs aren't that good" and maybe not check the other games. That and that they'd have to add BscotchID integration and perks and stuff
