Unfortunately a large proportion of our users are non-profit organisations, charities or social organisations - as a result we try to keep our prices as low as possible for all our users and are not able to offer discounts.
Private events are managed either by Joomla ACL, RSVP Pro or the user specific events addon (depending on what you mean by private) - i.e. members only, invitees only or creator only.
If you are already using EasyBlog then you could use EasySocial - we offer a basic integration where you can view events created by a user or being attended by a user in their EasySocial profile. The other options are JomSocial (commercial) or Community Builder (free or commercial depending on the features you want).