Today around 12:00pm EDT, a post was uploaded to r/whenthe by u/concussionmaker_91 about how despite their multiple privacy measures, Reddit was still able to ping their location and show them an ad about a business in close proximity to their house. Then, in less than 2 hours after the post when live, their year old account was permanently banned. 
Redditors in the comment section used a website called SnooSnoop to see if this account has done anything malicious in the past that may be grounds for a ban only to find nothing. 
I don’t think this is a mere coincidence and some comments I read on the post may be there to dismiss the situation.
I’m currently working on archiving the post and comments in case Reddit decides to try and erase this entire situation from the web, I’ll attach the files when I do.
It just takes one time logging in without having VPN enabled for your account to be associated with a location. Their ad network probably filters out known VPN IPs, or IPs from countries where there are no ads to serve up, which might leave the only valid IP address associated with their account to be used.