Has been a great couple of months since our Indie Hackers interview went live, and Dependabot is now up to $1,750 a month. Not enough for me to live on yet, especially after GitHub take their 25% cut (Dependabot's revenue all comes through the GitHub Marketplace), but we're getting there!
The only thing we've done to drive the growth above has been respond to support requests as quickly as possible - we still haven't dipped our toe in the water of paid advertising.