There are thousands, and thousand of useful places, each for free. Take a look at awesome lists at github. These provide so much value to the society. It does not require any subscriptions, nor money.
There are millions of people who share education, and knowledge for free. If you build a business, you need to build it around things that are sustainable.
The old boomer internet is also over. Google will not lead anyone to any niche blog, or site. Now everything is inside big tech siloses, where "the algorithm" spoonfeds people with what zuckerberg likes. Go advertise any real http domain with any useful data. Nobody cares.