I have been obsessed with the idea of helping advertisers find their customer on Reddit. The biggest issue i see is simply "not knowing" because there you can target more than 143 thousand subreddits...
that is crazy amount of subreddits to check.
Luckily for you, i'm building a tool.
if you want to know where your customer is located- send me a private message of your website URL and what product you are selling.