Hi! I work at a bank, that specializes in Credit Cards. I take a bunch of mandated training. The answer to your question is a
RESOUNDING YES
It is DEFINITELY discrimination for me to exclude Black people from lending money, or from OFFERING (aka advertising) to lend money. It is discrimination for me to offer different rates to Seniors than non seniors. It is discrimination for me to offer different TYPES (think: low APR with annual fee) of credit cards to poor people.
I'm not sure if FB should be in trouble, but the credit card issuer will have to explain this to the regulators.