A former client of mine built a wonderful mobile app that actually calculates your bra size: https://www.wacoal-america.com/find-your-fit
https://www.wacoal-america.com/privacy-policy
Yeah, that would be a huge NO, what could go wrong with app collecting user breast photos, which can be matched with user phone number and also sending them to 3rd party.
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Their selling point is that you can get rid of the "measuring tape and bra quizzes", but the demonstration video clearly shows that you still have to answer quite a few questions for the thing to work properly. Not to mention that the measurements it gives cannot possibly be accurate if they instruct you to take them while wearing a bra, and the poses shown seem to be more applicable to measuring generic things like your waistline than your bra size.
Honestly, it sounds to me like they were too busy figuring out whether they could to stop and think a minute whether they should.