Private: This is not a network for every Tom, Dick and Harry. We don't do any data mining and our logs are deleted on a regular basis (we do not like to store data for government or ad agencies). We do not want millions of users – too much work. If you want to mingle with a billion or more people ... please do go on to Facebook and mingle there.
Personal: This is for people who want to be just with their friends. Real friends and not the hundreds of dimwits who call themselves friends and are in reality just coworkers who you just add to not alienate them.
Pure: We do not pester you with advertising, silly games that steal your lifetime and other stuff that you did not sign up for in the first place. This is purely to keep in touch with people who are important for you.