Hindenberg's 2024 report titled "Roblox: Inflated Key Metrics For Wall Street And A Pedophile Hellscape For Kids": https://hindenburgresearch.com/roblox/

And I assume this[1] is the reference to Backblaze? Notably not Hindenburg and more recent, but I believe there is some team overlap and there doesn't seem to be anything else.

[1]: https://www.morpheus-research.com/backblaze/