For EA it is less about datamining and more about flagging behavior that matches that of a cheater evading a ban. Cheaters reduce the fun, and therefore value, of a game.
I only own one game and it's offline, so there's that
If your concern is datamining, then you should be far more concerned about the billing info (which can't be faked) than the email.
with the state of most data mining programs out there, moving addresses will destroy any ability to link you.
Right but changing your billing address/credit card number is still way much harder than creating a new gmail/outlook account.
FYI you can often set the billing address info to whatever you want for a lot of purchases, there's no mechanism to validate it.
"Businesses in the United States, Canada and the United Kingdom use AVS" I don't live in any of these countries. Even so it's more cost for business to use AVS, most won't. The likes of my mobile phone credit or Steam or Spotify or cloud services don't use any sort of address validation