But what is the business sense of having an office and staff, advertising the brand in magazines, etc., then NOT getting any money from the sale of the grey market goods, and then having to provide service for a non-warranty product that costs the same as it does for a purchaser whose purchase of official market goods helped to keep the local distributor's doors open with staffing and advertising and spare parts inventories? What business sense is that...make no money in the iniitial sale, yet absorb all the advertising and distribution and service costs?!
Don't get me wrong, I'm not saying they should cover anything under warranty or "absorb" anything. I think charging an extra fee above the out-of-warranty rates for exactly that reason is fair.
I would expect out of warranty repairs to be its own P&L. You're implying that profits from new lens sales are subsidizing out-of-warranty repairs. Do you know this to be true?

