That's indeed the case. I basically code my own things and then release them as open source. jQuery Tools, Head JS and now Riot.js 2.0 to name the biggest contributions.
HN is an unique place to get feedback for your own work. I certainly have opinions about others work as well but usually I keep my mouth shut and go back to work.
In fairness, open sourcing a project is quite a big courtesy to begin with, and providing a website, support, documentation, etc is much more of a commitment than leaving a comment on HN.
There are more than enough people on HN providing huge amounts of feedback about everything they can at the slightest opportunity. I don't think that tipiirai's contributions are sorely missed.
To be clear, I take nothing away from what you've done here: More tooling options are rarely—if ever—a bad thing and your presentation of riot is beautiful and clear, very well executed.
HN is an unique place to get feedback for your own work. I certainly have opinions about others work as well but usually I keep my mouth shut and go back to work.