A slightly related concept I would find interesting would be a way of visualizing and summarizing ISP/AS information in general (without any expectation the user would be particularly interested in their own; though that could be displayed on the landing page, perhaps). For example, an alternative way of presenting what https://bgp.he.net provides (example: https://bgp.he.net/AS33657#_peers, plus all the other tabs).
Providing an easy, quick, simple way to see "what network providers are upstream of this ISP/AS?" could be a useful feature.
Ideally without just being a proxy for bgp.he.net (unless the UI is totally unique and actually presents things in a fundamentally different way), and ideally without any VPN scarevertisements.
Frankly, this is why I've yet to pursue solo entrepreneurship myself. Unless you get really lucky, it seems there's a constant trade-off between "parasitism/skeeviness" and "not being able to afford rent or food". I've got plenty of ideas, but, so far, all either wouldn't provide enough for me to sustain myself, or would be too shady for me to be comfortable with, despite being legal.