[dhosek]

Because right now debit card purchases don’t have a transaction fee while credit cards do. I just had two recent purchases where the vendor charged a 3% surcharge for credit cards but would do the transaction by debit card free.

[woobar]

It is an example that greed is everywhere. Not only among card issuers but also among merchants. The moment merchant find a socially accepted way to extract extra they will do it. Similar to tip screens on square terminals in all takeout places. Costs nothing to ask, generates some additional revenue.