We upgraded the Virtuemart Reward Points Extension (for vm2) with a new option, to let administrators to receive email exactly how customers receive them.
Emails are separated for earning activities (included bonuses), chips (coupon) creation and credit points purchasing. This new option will let administrator to debug their html emails and, when work fine, turn off the function to not receive them. We are working now on a internal messaging system for the customers when they earn new points. Not only in the registration of a new user, but even the first time they will go on the website after purchasing (that is the case of a "thank you page" from payment websites).
This is one of the most growing and updating extension for joomla at the moment!