Seems like a simple question but honestly, I’m not sure of the answer.
Here is an example of what I mean.
Say I create Google account “A” using my Proton VPN account and a specific device. Then I create Google account “B” with that same Proton VPN account but on a completely different device.
Can Google tie accounts “A” and “B” together using just the fact that I used the same Proton VPN account? Other fingerprinting vectors should not be taken into consideration (phone number, browser fingerprint, device fingerprint).
Obviously Proton itself would be able to correlate the traffic.