Because it’s one more degree of abstraction from the fraud and thus slightly safer. People absolutely sell working CC numbers online.

I mean I don't wanna just do cash advances on 100 stolen credit cards. That'll get you caught so fast.

Legit crypto exchanges won't accept credit cards anymore, they want a bank account attached.

You can use it to deliver stuff to like a nearby location you can like pick up, then sell I guess? But how often can you do that?

Using in stores assuming you have a physical card is dangerous because if it's reported stolen by the time you use it, they'll let the cops know and turn over the camera stuff.

Compare to, send the CC info to a random person, get $200 in crypto, and let them do one of the above and take all the risk. If you have 1000 stolen cards that is just so much safer and faster.

They work but very risky to use. Much better to sell them off instead of using them yourself.