*Ad free, and you don't; that's why thanks to EU legislation and GDPR protections, you as a consumer have the option to always request them to send you all your data, and to have your account removed when you no longer want to make use of their services. They are also required (I believe?) to inform you of any changes in the terms and conditions, privacy policy, etc that you have agreed to.

So there is a lot of legal protection you are entitled to, however you have to do your own due diligence - read the privacy policy, read its updates, double check the data extraction once in a while.