No, it is not. Each membership passive rewards continue until 3X the value of that particular membership is reached. The repayment can be accelerated by different strategies. But at no time does payment go to more than 3X the value of the membership.
“Acceleration” of rewards means you will receive that 3X a little faster.
Note: rebuys do not change a single thing about any previously owned memberships. A rebuy is simply a new membership which pays a minimum of 0.5% of the value of that new membership until 3X is reached.
Referring others accelerates the time-frame and means you reach that 3X faster on each individual purchased membership.