A few months ago I launched https://www.ripplescan.com for visualizing the Ripple (XRP) cryptocurrency. I posted a few links around some subreddits and HN and have been letting it grow organically since about March.
It turns out someone linked to https://www.ripplescan.com from a high traffic site in China and it's been driving some solid growth with returning users.
Stats for the last 30 days:
165k page views
I posted on IH a few weeks ago asking how to monetize traffic from China. I was unsuccessful at first but discovered some discussions online about how Google Adsense ads convert well with Chinese traffic. On May 1st I threw some Adsense ads on the site and forgot about it for a week. I checked a few days ago and my Adsense revenue is up to $90 for May :) I'm going to continue improving the site but it looks like I'm on pace for about $160 - $180 this month in revenue!
Just wanted to share! Has anyone else come back to an old project to find out that it started bringing in revenue?