People keep saying axe this axe that, but no, it's not axed. An axe happened when the publisher decided the series is not profitable enough to keep running on their magazine, so they shelved it to make place for another series. But for cases like this, they already decided how long it would run from the get-go. Their main business still lied in the novel, so they only commissioned the artist for a short series (usual just 1-2 volumes) to hook the readers in. Only in a few rare cases when they deemed something had potential to be a big hit that they put enough endorsement for its full adaptation, otherwise you should expect a non-original manga would never run for long.