I've less repositories, ~30 repositories. 5 or 6 of them I would consider significant projects at least from my point of view (aka a lone developer who is actually more of a sysadmin/devops in his day job, so not it's not really my main trade).
I've yet to reach a project with 100 stars (even if two of them are getting close \o/).
And indeed, I never got or even tried to make money out of it. I already fell kind of a moral obligation to answer to tickets, sometimes emails, and exceptionally phone calls (actually happened only once), if someone gave me money for a project I would feel even more morally obligated, so that's why I don't even try. Also, my projects don't exactly have a success in the thousands of starts and users, so it's kind of hopeless.
However, contrary to you, I'm far less active in the last few years (contrib per years, 2014: 491, 2015: 1228, 2016: 1095, 2017: 646, 2018: 225, 2019: 288).
Basically, I lost a good chunk of my motivation, not sure why however. Either I grew tired of it, or my current job (since 2016) drain me of my motivation, or seeing tickets accumulating in my half abandoned projects discourage me, half thinking, "let not create another ticket generator" and "I should really fix this project before starting that new project... (and in the end doing none of those)".
It's not the lack of ideas, I have actually a few from small to quite big:
* web ui in JS to calculate production in Hearts of Iron IV (actually started that one, and also a good opportunity to learn frontend development)
* a dead simple and as transparent as possible artifact manager
* a small daemon to name your NIC because it's on a given network (think servers with several NICs and dedicated prod/admin/backup networks, it would far nicer to have them named eth-prod/eth-admin/eth-backup instead of eth0/eth1/eth2 (and sometimes eth1/enp0s3/eth0 because this special duck is wired differently).
* a C clipping library (I need one for a current project).
* a tsdb taking ideas from rrdtool, like fixe size DB, values computed at insert time, reducing resolution as time passes, round robin, with meta data like the unit attached to the metric, with a network endpoint, and some support for a multi-node setup, all that written in Rust (because I don't know the language yet).