Linux is absolutely ready to spy too! The infrastructure is all in there and non-removable: dbus broacasts anything happening in the system, systemd starts background services by it's own and auto-updates are the norm. Last time I tried Ubuntu, it had popularity-contest installed by default. Apparently the scandal was big enough they removed it. [1]
I do use Gentoo currently, but it's so very hard to keep programs from monitoring what happens in the system via dbus and the only firewall for outgoing connections, OpenSnitch, hard-depends on it. Running every major program in a container is NOT a solution.
So far Linus has kept these things outside the kernel, but he won't live forever.
Popularity contest comes from Debian. Although I see nothing wrong with it. It asks you on install, whether you want to use it, and you can uninstall it at any time.