A traceroute won't show anything relevant to the use of other services. It will only show the path the packet follows and will omit layer 2 equipment, such as a switch. Which then can be further used to export and log data.

From your Reddit link, which I have already addressed, user common_sense7 goes into detail about the relationship with data mining Tesonet and ProtonVPN, direct link: https://old.reddit.com/r/ProtonVPN/comments/8ww4h2/protonvpn... The thread was even locked by ProtonVPN's mods.