Replying here to throwaway2037 because I can't reply directly to him, but yes, even most informal businesses accept PIX, including some random guy selling candy or bottled water at a stop signal.
The only exception I have found to consistently refuse PIX are some parking lots, and they refuse credit cards as well, accepting only cash, probably to hide their earnings.
The only exception I have found to consistently refuse PIX are some parking lots, and they refuse credit cards as well, accepting only cash, probably to hide their earnings.