If you do a 6 continent fare you have a minimum of 6 intercontinental segments which limits you to an average of 1.67 flight segments within each continent - fine if you are going hub to hub but if you fly into LAX and want to go to Calgary,that's your 2 segments in North America done. Similarly, if you fly into JNB and want to go to Victoria Falls,JNB-VFA-JNB will use up your two African segments. When you remember that a couple of years ago a 6 continent fare allowed up to 34/35 segments using the two entries allowed into certain continents,things have sure changed a lot.