Not to defend amazon but you can remove the ads by paying to remove them, they sell one model ad supported and another that doesn't have ads if you buy the ads supported you can remove it later.
Depends on what you consider "ads": I have always been paying for ad-free experience, but I regularly end up on the screen where there are ads for books I do not care about (they probably say that's just the store homepage, but I do my shopping on the laptop).
