I've been using Reddit to build a community for a couple of small local brands in my area!
I really enjoy Reddit because of the ability to create organic traffic from the site. Once you create a post, you can see if anyone reacts to it organically, or is familiar with your product or service.
It's also a great platform to interact with your consumers. You can answer any questions they might have, or provide them with information they are seeking about the product.
I've taken a more informational approach to Reddit starting out because a lot of people weren't familiar with the brands in the area. I always ask if anyone has questions, and I've been pretty successful in communicating with what used to be 1 or 2 consumers every couple of weeks to at least 5 a week.
The more time and effort you put into it, the better results you'll get.
I recommend it!