As long as it doesn't affect the high quality of product and customer service, a rewards program sounds fine. 
I struggle financially, like many, but I think the current discount is adequate. We're supporting a growing, significant concern, and superior product should be rewarded. The customer is rewarded when 
vaping.
Jerry's WTA 
juice sells itself, and further incentives are unnecessary, IMO. It's not a Mall Wart, after all.