We don't make any money out of our store. We literally receive $0.00. All the money goes to Redbubble, the firm who manufactures and ships you the T-shirts, stickers, etc.
It's not because we're altruistic, but we can't face the tedium of doing the paperwork and completing the tax return, when all we'll make is probably three quid.
Anyway, we hope you'll still buy something here as it helps spread word about the podcast to other potential listeners. AND you will look extremely cool. Maybe.