I used to work for a company in a niche industry that used to clear 7 figures a year using the online platform I put together back in its heyday. And while traffic isn't quite as good as it used to be, it's still at about 70%. Their ad revenue is today about 1/8th of what they were making back in 2011-2015ish, and they basically have zero dedicated staff to the platform. I just do some maintenance and bug fixes for them every month.