system
A chat on subreddit /r/wallstreetbets
human
That’s not how the income statement works. Their revenue from the card is higher than $1Bn (I.e. could be $5Bn) but their costs exceed their revenue by $1Bn this year (I.e. $6Bn). Thus a loss of $1Bn. 

Revenue also isn’t a very useful metric. If I have a business where I buy houses for $1MM and sell them for $500k I could probably make a lot in revenue but that wouldn’t be a very good business. 

You want to look at margins etc which consumer banking isn’t very known to be good for and that helps explain how Solomon managed to lose money in his consumer banking bet.
gpt
Sir this is /r/wallstreetbets.