Casaos is a Chinese commercial "loss leader" software added to tons of Chinese brands. It is not intended to make money by itself, it is intended to sell more home nas market gear like zimaboards.
It's also not an os, despite its claims and confusing terms on Wikipedia.
Last, casaos sends telemetry to Chinese IPs, a fair amount more than most software, based on what I saw with tcpdump alone.
I'm not sure how casaos made its way into the "open source os" space, but none of what you're saying is new.