You don’t have to load Amazon content just because it’s a Kindle. Especially if you’re buying DRM free stuff, it’s trivial to load it on the Kindle. Just because the Kindle CAN read Amazon DRM’d stuff doesn’t mean it MUST.
It also doesn’t give away your info if you’re doing that.
I’m unaware of any readers that don’t support some kind of DRM’d media, including the Kobo. You just couldn’t sell the thing.
