Sounds like quite the collection, very cool. I have a JH-1 myself. Regarding the account, it reset because we are using an entirely new platform than the ones in the past (ezBoard, Yuku, vBulletin). Those were hosted outside of the main site and functioned completely independent. Therefore, it's a different account date with this new platform.
As far as rewarding loyal consumers, it sounds nice but logistically there is no way to track a loyal consumer based on how much they spend on product or quantity of instruments owned.
How about using the honour system? Looking forward to my new free ESP Workshirt! Thanks ESP!