

They’ve been open sourcing parts of it the entire time. Looks to me like they’re doing what they said.
You can easily monitor network connections to see what addresses its sending packets to. You can’t collect information without sending it somewhere. Run Firefox through a proxy, and you’ll see it is far from private. The source code will show you what they’re sending, but nothing about what they’re doing with it after it’s received.
The browser isnt paid though. https://help.kagi.com/orion/faq/faq.html#business
I agree the $5 a month option is pretty useless, but I also think $10 is completely reasonable for everything you get.
Also even if it was paid why would it have issues with a package manager? Paid software generally just uses an account or license key to verify payment, with the executable being frwely available. JetBrains and Burp Suite are two software that come to mind and both are in many repositories.
Edit: To be clear, the browser will only be for Kagi and Orion+ members during the testing phase, likely just to control the size of the testing group. After that it will be free.