Come on, there must be better ways to make money.
This is a direct attack on users privacy by sending, what the user thinks are local searches, to Amazon. If this really will be implemented, Ubuntu and Canonical will lose all the trust they had to work hard for to gain. Linux users in general are a technical and very privacy aware people, who cannot and will not stand for this.
I for one always used to go around and promote Ubuntu as a great OS for everyone, with this rather shady move you'll take very good arguments away from me and I will have to look elsewhere for a distribution where the user is king and not the advertising partners of Canonical.