That doesn't surprise me... as we haven't heard any updates of the boxsets selling since the first day of attendee registration... so most of the remainder is likely to be available to non-attendees.
I was 50-50 on whether this year's set would sell out, as it had the Scorponok and smaller production numbers to sell it, but the decline in support of FunPub must be even more significant than I'd expected (if they can't even sell about 1500 sets worldwide).