Thats true, once you discover they have shifted to another product, I think the next thing to do would be to start selling that product as well. Like I have seen some sellers who even go ahead to introduce their customers Into other products as alternative just so the customer won't go else where.Yes, I think so too. Customers won't mind paying same price for a reduced quantity but they might try to find an alternative if the prices of the goods they usually patronize increases.