I think that a tiny team of them worked very hard to produce that periodical. From her twitter activity, current editor Mary Ann Horley seemed to be literally working 24 x 7... even with a new baby !
They have had an on-line presence for a while now,
see here, but I think that a digest of race reports and technical insights are not the kind of thing that today's teenagers [the main exponents of the sport] are interested in. They prefer to get what they need as twitter soundbites, Facebook posts... and occasionally rants on Karting1.co.uk's forum. Nothing bad about any of that... it's just a change of times.