Utilize your financial knowledge, give your answer or opinion to the input question or subject . Answer format is not limited.

Is it bad etiquette to use a credit or debit card to pay for single figure amounts at the POS
It's fine.  Some people (including myself) charge any amount, no matter how small. I think charging small amounts is encouraged by no longer having to sign for small amounts (Not sure if this is state-by-state, though).   Somewhere, the transfering of digital money is being paid for - either in the merchant fees, an ATM fee, or my time in going to a bank or ATM where I will not be charged a fee.