Is there an upgrade to be able to give an unlimited amount of links out on the private setting, so that I can have more viewers than the 10 that wordpress allows while also keeping my blog/website private and needing a password for log in.
There is no limit on the number of people you can invite to view a site marked Private, however, the email sent to invite viewers is limited to 10 email addresses. This only works when you’ve marked your entire site Private. The site you linked to is public. http://en.support.wordpress.com/settings/privacy-settings/