In reply to Otto.

They offer now 5 days trial, so everyone can try it free. It looks cool and probably one of the most reliable solution for WP backups now, anyway I m not always comfortable with cloud solution if I m not able to control data there. All data are somewhere, I don't know where.
I was not able to delete these data after deactivation and not sure what is just hidden and what is really deleted. I had to contact support, answer was super fast and they fixed it.
Still I m not able to delete whole account there, that I don't like at all in any website or service, the same as all wp.com account.