While I love Privacy, the reality is a lot of merchants block these kind of virtual cards.

Also, really, a throwaway account to post a referral link?

Personal anecdote: I've only had one that didn't accept a privacy card, my rent. Other than that, it's been golden.

I’ve had a good number block me from using them, typically in industries where fraud and chargebacks run rampant. I.e. gaming services.