So this is a quick hack -- I have a user registration system but I didn't want people parking on reddit usernames. For any user that gets scraped from Reddit I add a "r." in front of their username. The '.' character is invalid in usernames that are user-created. If you sign in with Reddit, you can change the username to whatever.

Thanks! I'm unable to post it there unfortunately (or really anywhere on stocks subreddits) due to moderation rules around promoting webapps but I've seen a lot of those posts.

That is a cool idea. Also, posting it there is going to jack your hosting costs immediately, haha. But why not post it - what's the worst they can do, ban you for posting something useful?