The reasons are unknown, because Automattic does not explain it sufficiently, but the reality is that it is impossible to erase your WordPress.com account you just do not have a way to do it.
The fact is that in WordPress.com you can delete a blog, or all you have, but there is no human way to delete a user account Automattic does not allow it, how does this support page explain
You can change the username, even request – with a long wait – to change your email your account so that, for example, you open another account with the same email, but you can not delete your user account even if you do not have blogs, even if you do not use it, never .
In fact you will continue to receive email notifications unless you take the precaution to disable Rlos before leaving your WordPress.com account in the limb of the Automattic servers.
Not even the site Justdelete.me which gets to remove your fingerprint from a stroke, just one click, a good amount of web services is able to do it, it is simply impossible.
So if you want to be respected your right to digital oblivion to eliminate your fingerprints in the network, do not choose the free blog service of WordPress.com or simply use an email address and user that are not relevant for you, because you will not be able to erase it in the future.
I really greatly respect Automattic thanks to your great WordPress people are better every day, they are really committed to the development of free software, but User account policy of your blog service Free sincerely leaves much to be desired . We put green to Facebook and other networks on a daily basis but the reality is that even these reviled services respect your right to digital oblivion, and in WordPress.com no.
What does this policy mean ?, It can happen to you as in GoDaddy , that there is no way to avoid being sent over and over again promotional emails, then – there too – it is impossible to delete your user account, and take advantage of it.
en.WordPress.org and here you will learn every day to use it and take advantage of it, with total freedom and respect for your privacy .
What do you think about this matter?