So for a few sites I worked at, we had subreddits for our sites. I even started making my own for my sites, but I realized for me, reddit wasn't the best place to promote a site. Honestly I feel like reddit is annoying to use. There are so many rude people, and spammers that I stopped making a subreddit for my sites. If someone else wants to, go for it, but I will not use reddit for my sites ever again. It may work for you, in which case, awesome, I'm glad someone can get that site to work for them.