We are forced on daily basis to give our name, phone, address, documents, etc to buy most of the things we want. Every time you buy something online (from home appliances to travel tickets) we are asked for personal information. Soemtimes even to watch a video or download a PDF we are asked what is our email address or your phone number.
The message of this topic is slightly different. The topic is not for those who do not want to give out their personal data. This topic solves other problems, not to create additional copies of your personal data, which will be stored in someone's correspondence, and so on. For those who do not want to give out their name and geolocation to anyone, this method will not work; in such cases, a different approach is used. Using PO Boxes or third-party delivery services from other countries.
I used this service a long time ago. Through it on the forums, various kinds of "freebies" are often distributed, intended for distribution on one hand.
But for private messages, I would also be more careful. Passing important information to the service is a dubious matter. This reminds me of VPN services that swear they don't keep their clients' logs. Which is ultimately sheer nonsense. If such services exist, they are unlikely to have only good intentions.
Use a breakdown of your data across several similar services, for example. Although, if you have highly developed paranoia, then it is better for you not to use any services at all, because everywhere you see a catch and a keen eye of your big brother.