Amazon does this! Morons will ask you to "click the link in the sms" to "authorise access". I can understand doing this randomly once or twice, for security. But every single time!? Figured they were doing it for two reasons - data-mining (to figure out what mobile phone and mobile browser yo have, and to leave an Amazon cookie on your mobile browser), and to harass you into installing and using the Amazon app instead of the website. Had to call customer support multiple times before this stopped (who kept urging me to install the Amazon app).