Wired magazine has apologised after a fitness tracker giveaway proved too good to be true for some of its UK readers. The tech magazine had run an offer promising new subscribers Misfit's latest activity and sleep monitor. The deal appeared tempting, since the total cost of the package (a £9 subscription for 6 months) was less than a fifth of the price the Misfit Flash retailed for on the High Street (£50). But when details of the offer spread online, the magazine's publisher said it was "overwhelmed" by the response which has led to issues with supplying and some customers missing out.