Table JX has the ability to link to some other content (URL, Article, ...) If you have e.g. 1000 users it is very hard to write a link to each profile. For that situation you can create SQL view and display this with TableJX. SQL has the ability to work with string so you can easily "concatenate" part of the url with user name, so at the end you will have a link for each user. If you need help to write SQL view, send us mail with details, we will try to help.
To filter out superadmin: if you are presenting jos_users (standard joomla table for users) you can write in WHERE section:
usertype <> 'Super Administrator'
The administrator has disabled public write access.