My point was about the validity of our sMerit not the validity of Merit sources.
I wanna let you know that there is no expire date for sMerit. You can use your sMerit anytime. It doesn't matter that you are using your sMerit today or 1 month later. It will remain same on your account.
It is to notify you that forum authority reserve the right to decay unused sMerit in the future.