There were some hiccups with the refill trades on the test server, and most of the event has now been removed there but those hiccups should (cross fingers) be ironed out by the time the event is live here and the refills should be tradable both as offer and cost. Like a number of "add deposit"s the ability to ask for the Pumpkin Refills as a price in trade needed a little extra fixing but that also looks like it's been addressed.
That said, as many people know France usually get new things a week ahead of the rest of the TSO world (Thanks for all the guinea pig efforts FR, truly. ) and there is a line in the French changelog for their tweaks tomorrow that is interesting. But! Before I go posting it here as Completely Accurate could someone with solid French check the translation? #2 post, 2nd line re: Refills, Trade and Removal Phase