You aren't fully anonymous. Privacy.com has your info. The vendor, or their bank, can easily determine you gave them a privacy.com number. A court will happily compel privacy.com to turn over your info if the vendor can show the most basics of an agreement between you and them.

It doesn't guarantee the vendor will win a final judgement but no court is going to prevent them from tracking you down.

> the vendor, or their bank, can easily determine you gave them a privacy.com number

evidence for that, please?

There are numerous advantages to a privacy.com number besides cancellation:

* you're sure that your real credit card will not leak out when (not if) they get hacked.

* You get notified every time the card is charged (or declined).

* You can set dollar limits so they can't pile on other charges.

* You have a complete record of all the charges on that card. You know that no other vendor can use it.

So refusing a privacy.com card, if they can even do it, would be a consumer-unfriendly act.