Here's the Tweet that kicked off the Twitter thread where this report was shared:
I'm excited to share @River's Lightning⚡️ Research with you that I've been working on over the past while!
In our first report, we publish our Insights from running some of the largest Lightning Network nodes out there 👉 https://river.com/learn/files/river-lightning-report.pdf
A sneak peak below 🧵

Also see:
and
River Lightning Services - Bitcoin Lightning API for Developers #80223 https://www.rls.dev