From the MLM Blog Archives:

When I was first involved with Amway, we had a communication voicemail system called "Amvox". Amvox was a product provided by Amway and was not part of the 8 CORE steps that were required in order to succeed in Amway, according to the Britt and World Wide Group System. Amvox was not vital but was suggested.

Then one day, BWW and WWDB decided it was a good idea to come out with "their own" voicemail system called Communikate. Communikate was a definite upgrade from Amvox, but for the most part is still served the same purpose. Typically the upline used the voicemail system to send out a message telling everyone how important the next meeting is and how important the major function is and how great the standing order tape is.

Once Communikate was rolled out, voicemail became the 9th CORE step!

I was told specifically by a founders triple diamond in WWDB that the diamonds "make a lot of money on Communikate".

All of a sudden when the voicemail system is lining the pockets of the diamonds, it becomes vital to your success. Interesting.