I used to be a regular customer but I don't go any...

I used to be a regular customer but I don't go anymore since I was denied a loyalty card. While I gave details of my date and month I was not comfortable giving my year of birth as I it was too personal for a bubble tea place to maintain my year of birth and I am not interested in being part of your research on me. So I was denied a card since I wouldn't give the yrar of my birth! Since I used to go regularly I don't any more. Disappointing that they have to have it their way or the high way. It would be good to respect what your customers are comfortable with and not force it on customers to provide information they are not comfortable and may consider too personal. Would I then have to provide my marital status, how many children I have etc? Disappointed!