I've repeatedly found small clients (think a few days a month) on the monthly HN Freelancer thread at my normal, US-centric, senior+ rates. Sometimes it's clients by proxy, where a thread reader will connect me with someone else they know that isn't the original HN respondent.

My response rate improved considerably when I shifted from highlighting my tech stack to my actual effectiveness. I haven't had sufficient availability to pursue HN-based leads in about a year, though.