Anyone can and with time will leak your info. It is unavoidable. Most businesses will not do it on purpose. 5dimes is one of them for sure even when their lack of IT security is mindblowing. Even 1-2 years ago you had to send them password each time you requested something so they were asking for troubles.
I am trying to have as much privacy as possible, but when money is involved, it is impossible. I did not have major problems so far, but my biggest problems came from data leak at 5* hotel in Tokyo (I do not live only in 5* hotels and all hotels in Japan scan my passport as everyone elses). Simply that is the rule nowadays. You can opt out, but then no business.
If you talk to God, you are praying; If God talks to you, you have schizophrenia.