Huh. I am currently on Google Fi.
I'm not thrilled putting Google in charge of my mobile data, but I still trust Google to safeguard my privacy more than any of the major telcos, and for someone who uses small amounts of data, they're very competitively priced and have really good, simple billing.
But particularly with the Librem Phone coming up, I've been trying to find other phone providers I won't hate that can give me more flexibility in devices and that at least somewhat shares my values. Community Phone looks really interesting. I'm frankly a little bit weirded out that the prices are that low, I'm going over the site trying to figure out what the tradeoffs are.
Rolling out a feature like this would definitely make me more interested in switching. Even if I didn't think it was valuable for me personally, it would make me feel like the company was in close contact with its users and working with them, rather than just blindly selling to them.
From a pure feature point of view, I would still want unknown people to be able to leave me messages. I get legitimate calls from unknown numbers -- but my policy is that if I don't know you and the call isn't important enough to leave a message, you're either spam or I don't care. If it is important enough to leave a message, I screen that and then add the number to my contact list if it's legit.