It is largely about reasale rights, IMO and I think the hole that Bond may be seeking to plug here is to do with the loss of income due to the size of the decants available from TPC. I believe the biggest is 8ml or 10ml?
If a potential customer receives a 2ml sample vial and really likes the scent then he/she MAY well spring for a full bottle.
However if a potential customer can buy, let's say, a 10ml decant - that may be enough. In which case Bond (or any other company) have lost the sale of a full bottle.
It could be argued that TPC are doing what many companies (IMO) SHOULD be doing, that is offering 10 or 15ml bottles (like Hermes do with the Hermessences line) but that's not the point.
Perhaps I'm way off beam with this but I think this could be the issue. TPC pay for one 100ml bottle, then ration that out in 10ml lots (making a bit of a mark-up), with 10 happy customers who have no need to buy a full bottle from Bond. That's a 900% loss in potential income for the actual manufacturer. They sold ONE to TPC, but in their minds they could have sold another NINE to the people who ordered the 10ml decants. (I am not a maths guy but I think that this rationale might hold up for an accountant at Bond).
I believe there is a reason why most perfume companies offer 2ml or relatively small authorised, labelled samples - it is so the customer can try it a couple of times, hopefully go through it quite quickly, and then come back for a full bottle purchase while the experience is fresh. It's the bait on the hook . . .