One of the selling points of the Amway business is for people to do the work once and then reap financial benefits for life. But that simply does not happen for the vast majority of IBOs. The reason why most IBOs do not have a sustainable business is because their business is not based on sales to genuine customers with a genuine need. Most IBOs themselves will not buy Amway products once their affiliation to Amway is over. They don't mind paying inflated prices while they have dreams of untold wealth, but their desire for those products fade as their dreams fade.
If you are an IBO doing your 100 PV monthly, then your only way to increase volume is to sponsor downline in hopes that they will also do their 100 PV as shown in the plan. And even if you are somehow able to accomplish this and sponsor a bunch of people as shown in the plan, chances are that many IBOs will "do nothing" and of the remaining, some will move 100 PV, but they will likely quit in one year or less.
In many or possibly most cases, IBOs are only selling the Amway opportunity and not Amway products. They sell the possibility or hope that they will build a business, walk away and collect untold wealth for the rest of their lives. It isn't going to happen. Say for example, you sold 100 PV monthly on a consistent basis to customers. These customers will automatically go online and make purchases when they run out of their products. If you are lucky, they will also refer friends to make purchases. But most IBOs do not sell products, they are selling the opportunity. Making residual income sounds like a good idea, but paying for overpriced vitamins and other goods "wears out its welcome" once an IBO realizes that their Amway business will not deliver lifelong residual income.
That brings up the next point about why an Amway business is not sustainable for most. The products cost more than most other retailers. That will limit the potential for customers and referals. Amway defenders like to cite quality issues, but most customers who shop online aren't familiar with Amway products and have no way to know whether Amway has quality products or not. That leaves them to decide based on prices. And Amway in general, costs much more than Walmart for the same or similar products. A tough sell indeed. And quality is subjective, so most people will decide on price alone. And on that basis, Amway cannot compete.