That is what all claim - I guess the NSA officials also believe that they collect data only to improve their service. This justifies nothing.

Can you please post a link - I would like to read such statement, maybe it helps to dispel my doubts
By the way, Jolla's privacy policy says:
We may share non-personal data (provided that it is anonymous) to select third parties. And about the importance of such metadata an NSA official said: ‘We Kill People Based on Metadata’.
But stop - no I do not fear to be killed by the NSA if I register a Jolla account
However, there are serious concerns that speak against data collection, e.g. de-anonymization.

I am not a lawyer - are you? If so, please share your expert knowledge about this issue and help us to understand why an account may be necessary. (Instead of insulting people only because they have concerns you don't share or understand.)