Most faxes these days are unencrypted.

If you know how to eavesdrop, faxes are less secure than google to google email. Or if you need to be certain you zip encrypted the file, send it over, and then call with the password… Or fax the password.

Google email reads all your mail and sells what it finds to advertisers.

The encrypted zip could work as long as the filenames don’t reveal anything. Google looks in encrypted zips and reads the filenames (which aren’t encrypted).

Google doesn’t sell anything to advertisers, that would be mega dumb.

They do sell access though. Advertiser ticks boxes for what they want their target audience to be and then Google shows it to those people.

If they sold all that data, nobody would advertise through Google anymore because it wouldn’t be better than competing services.

Now their three letter friends? Those guys definitely get data.