Hi
NCC, I can try to help you a bit based on my experience of using the
GMAT Club tests and
Forum Quiz.
If your access gets over and you reinitiate the same after a period, you continue from where you left off.
For example, I initially had the chance to explore
GMAT Club tests as an award for the GMAT Club world cup winning team. I attempted some tests during that time. After the free period got over, I purchased the tests (redeeming my points) and started from where I left off the previous time. I could analyze my performance on the previous tests and attempt the remaining ones.
The question bank does not refresh upon a new subscription. Which seems logical, given the current volume of questions are hand-prepared by GMAT Club experts and take time before new batches are released.
As for the clubbing part, I doubt there is a direct provision for it at the moment. You have purchase / redeem points for
Forum Quiz and
GMAT Club tests subscriptions individually.
I hope this helps.
Posted from my mobile device