[saxonww]

I don't know if this actually makes things better or worse - I do it in the hope I can shut down spam by removing a compromised address - but I try very hard to use a different email address for every business I purchase from.

You don't always have to provide a phone number, either. Most of the time yes, but I don't think the phone number is actually required to complete a credit card transaction.

There also used to be credit providers - maybe there still are? - that would let you generate a new card number for each purchase. That too may accomplish nothing from a tracking perspective, since the credit provider would be able to match up all the numbers. But, if I had that capability, I would use it.

[mkskm]

There's this one:

https://privacy.com

Apple Card does as well (and Apple Pay in general with any other card).

[BayAreaEscapee]

Bank of America stopped doing virtual credit card numbers a few years ago.

I think Citibank allows you to do it, but I have no personal experience or knowledge.

I have a card from Capital One that allows virtual credit card numbers.

Privacy.com is a service specifically for this issue. It allows you to generate lots of virtual cards and even use fake names so you can't be tracked so easily.

[hexa22]

I have once had a phone call about an online purchase telling me I had to pay extra taxes for the import.