Note that Jindal's been airing TV ads in Iowa, while Christie airs ads in NH:
https://uselectionatlas.org/FORUM/index.php?topic=218607.msg4743145#msg4743145
Bush's Super PAC has been airing ads in all the early states.
Kasich's been running ads in NH, but I think that was more in August than September. His ad spending has slowed down, and he's got more competition on the airwaves now.
Trump has aired no TV ads yet. Carson and Fiorina have spent very little on TV ads in the early states.
About Christie: is true that he is airing ads in NH, but he's up 2 points in Iowa, where he's not airing ads, so I think that there is a bit of momentum behind his growth, regardless of the ads.