Yak Tack -- a second "go"

I've been working on Yak Tack on the side for over a year now. In part, it helps me stay relevant with code as I don't write software at work anymore. And, in part, I have a passion for language, and I hope people can use it to learn and remember English words.

I have a second launch today running on Product Hunt. If you're interested, here it is: https://www.producthunt.com/posts/yak-tack-ii.

But my question for the community here is, how have people sustained the momentum they see after the spike (euphoria?) that comes with launching there?