How did businesses get my new credit card number before I did?

I have a lot recurring payments that I either forgot to cancel, or some services that I can't get to stop billing me no matter what I do. So I resolved to get a new credit card number, and started using virtual credit cards for most services as well. But I was surprised to find, when I logged in to services (Netflix, for example), to switch from the old inactive card to new new virtual credit card, it already had …

billing businesses card credit credit card credit cards matter payments privacy services virtual