I got the most traction from the subreddit I posted it on. FYI I am measuring traction based on how many GitHub stars that repo got (which is a bad way to measure I know). But good idea, cheers!
I'd forget all about stars and just find some people to actually use your software, bend over backwards to make sure they have a good experience, and amongst these people find and cultivate advocates for using it and projects that can promote how your software is helping.