and now we have more of a paper trail to stop them

Yes because most scammers provide their real information when scamming

The most common scam I see on Twitter is imposter accounts replying to a real person with a link to some crypto scam. Right now you can usually immediately tell it's a different person since the reply doesn't have a check mark, this system seems like it will make it easier since the scammer can just get a checkmark.

You really don't though. It's trivially easy to create new valid unique payment information with a free virtual credit card number and a fake name/address. This is a very hard problem to truly solve.

There's a reason there are entire companies that focus on the problem of ID verification, it's difficult problem.

Sounds like a valuable problem for twitter to play cat-and-mouse with. They literally make money for every try.

Are virtual cards actually useful for crimes? I assumed they were primarily for ending subscriptions that make canceling orders of magnitude harder than signing up.

Actual scammers I expect have stolen credit card databases to test.

If you can't stop the bots, might as well monetize them?