I've been down that road myself. Came across NotionLytics a while back - handy for basic tracking, but it never quite scratched the itch for what I actually needed. Like, sure, you can drop a code snippet into a page, but what do you really get? A few vanity numbers.
What got me was the frustration of not knowing whether a Notion page was actually working. Is that sales doc converting? Is that landing page generating leads worth following up? Or is it just sitting there, looking pretty? I started digging into the same kind of market research you're doing. We're building a prototype too - something that actually lets users pull real data and run proper analyses. Not just a counter, but insights like "this page drives leads" or "this one's a dead end".
It's wild how few tools treat Notion as more than a fancy notebook. So if your prototype can actually surface those conversion signals, you're onto something real. I'd genuinely love to hear how it evolves.