By far too much advertisement and no clear user guidance within the backend. In case you create an account accidentally (which is an easy thing to do by one mouse click), personal data is being transmitted to them and you'll get flooded with mails immediately the days after (4+ mails in less than a week).
Even if you ask their support to delete all of your data from their systems, and they confirmed it - it does not stop them to contact you the next day right away, asking if you need support in setting up things.
This might give an impression on how serious they take privacy and data protection issues.
My personal point of view.