Its the time everyone should notice internet isn't such a safe place like it seems to be, presence of logs/history is obvious, and tbh i care about the service quality more than that i'm not logged.
think of what would happen with ax if we wouldn't have logs to find out who made the trouble, etc?
for stuff you really don't want anyone to know you should use proxy and/or incognito mode, because this search engine doesn't prevent sites from tracking you, just it doesn't serve the info on plate. And the ads picking feature can be turned off, in google + profile settings (in case your not logged into one, google could only access your ip/browser data which is accessible by anyone really).
i don't mean that its bad alternative or fake, but i know google tracks me since beginning and took it as an obvious thing and im fine with that.
PS: a real person looking trough your stuff would be like winning a lottery