Had they just loaded them on the ST E Card they couldnt be sold on so easily and could have been as easy as e mail print at home tickets. Then physicall printed and posted those that went on general sale charging for postage or allowed collection from Amex after the Brentford game
Both clubs are encouraging touts. If you go on tickets4.com tickets are available from £136. By club giving e mails I or anybody could sell the e mail with bar code to anybody. If it had been added to e card it would have meant giving your ST away if you sold your Arsenal seat...