Unreliable company. They offer a free data space (...

Unreliable company. They offer a free data space (stack). Beautiful you will think. Unfortunately, this service is limited, which means that it is of little use to you in practice. You can never trust free services and not these either. With a crappy story they put an end to free. You can pay, but otherwise your data will simply be deleted.
Very unprofessional. If the story is true, then that is not a good calling card. A company that does not make a backup is not very good.
I have also registered domain names here. That is otherwise okay. However, I would look further for other services.