The bulk purchase options are directly from StickerMule, so we need to get them to accept it!
Discussion
Or to find a different supplier who takes BTC 😬
You can take the files and get them printed wherever you like if you don't want to use StickerMule
It's my plan to approach them at some point and ask them to accept it but it's low priority right now :)
Files here: https://bitcoin.rocks/sticker-files
Very nice, understandable