[smikhanov]

Your entire digital life could be stolen from you if someone knows your name, address, DOB, and last 4 digits on your card. Attacker can go through e.g. the Gmail password recovery process very convincingly impersonating you.

[TekMol]

Gmail will let someone who has that information take over your email account?

The name+address+DOB of many people are public. So anybody who gets a glimpse at someones "card" (I guess you mean credit card?) would be able to take over their gmail? That would surprise me.

Do you have a link that confirms this?

[meiraleal]

And how is that information not part of the data leak which wouldn't exists if one stop using Visa?