They can give both false positives and negatives but you never know when that ' s happening so pretty unreliable . Follow your macros and you ' re in ketosis . <| sep |> Your missing my point . I don ' t think buying these were a play at retaining current customers . I think it was a play at getting new ones . Of course adding any content is a move to retain customers . How is that possibly a bad thing ? ANY business faces two huge challenges among others 1 . Keeping existing customers . 2 . Adding new customers . Anything your business does to address either of these challenges is a good thing , as long as it doesn ' t hurt the other goal . I can ' t see any way this would hurt them . <| sep |> Sounds like he might have self esteem issues ?