I never got a surcharge from a restaurant for using a credit card, at least not that I am aware of. I do look at the check (tab) very quickly at the table before putting my bank card into the folder and I have caught a few mistakes on their part, usually on the cocktails or wine.
I saved $1217 last year, which means that I used my bank card for purchases 1217 times. The bank takes $1 from my checking account each time I use the bank card and puts it into a savings account, no matter the amount I paid. It’s not a charge card or a debit card, although it can be used as a debit card, but I would have to give up my PIN and that won’t happen.