Idea:
"start here" page for the Internet
i.e. a rabbit hole for other rabbit holes
If you read blogs, some of them have "Start here" page for the first-time visitors (an
example from David Perell). On it, one can find useful links to make use of the blog to the maximum extent - the most popular articles, the most used terms, links to other
metapages and
metalists.
Why it's useful? You don't need to read through all the blog to extract the best. You spend 30 minutes instead of a few weeks, for example.
Let's move the idea to the whole Internet perspective. It looks like the first website directories tried to do that. They listed the popular(and not) websites on their directory setting a category / tag to them. In this way, if you know the catalog website, you can find the other websites that are useful to you.
Then, search engines improved their algorithms, we've got more and more websites and information. It's difficult and time-consuming to filter it. You still may go to the website catalogs but they for sure won't have
all the things you might be interested in. The same applies for search engines - they're
useful if you know what you're looking for.
The Internet has a
discovery problem: you can search from all the websites well but you can't discover well. There are websites that are news or articles aggregators, like Reddit - there you can find some new information valuable to you, be it memes, cats videos or the articles from an author that suggests the new Universe theory of all.
And people like such discovery / aggregators websites, they like to know there is always something more - funny, useful, new to them. For this purpose, we could create a meta-list of tags / categories of websites. The idea is to provide a beginner or not person a one place where one could start their Internet journey. You put your interests and the system suggests you some new websites. So,
it may work as a recommendation system.
But also,
it may work as a [meta] catalog - there are tons of links to other links that lead to other websites or threads. For example, I find some article about programming microcontrollers, and I see other links to similar articles and websites - a personal blog of a person who created some microcontroller, the other blog about a person who create a programming language for the microcontroller, a website about niche microcontrollers, a community in <choose your platform> of people who discuss microcontrollers, and so on.
Monetization?
1. You could make it as a newsletter and charge for extra materials, or make a paid option to subscribe - but then you should serve some nichy niche to send really relevant links. You may create 500 such newsletters for various topics. But maybe it's simpler to make it as a website with a different monetization model.
2. If it's a website, you can make people pay for extra functionality.
3. Ads on the website. If the website is free(people won't like to pay for links and discoverability features - think of Google, do you pay for it?), then you can put ads there. Make the website popular and you can live on those ads.