Phys.Org is pretty much a scince/green tech blog site. I would imagine advertisement funds find their way into hands..lol..anything is possible. I did find this at the end of the artice.."Peter Blezard, CEO of Azotic."
I think the prob has been that the bacteria sometimes leave the host plant..do not join at a celluar leveI...all based on genotypes. This new one, Gluconacetobacter diazotrophicus is supposed to have been discovered back in the 80's I think. I'll spend some time looking it up later..don't know much right now..but I did find found most of the names of Nitrogen fixers from a blogger..
nitrogen-fixing bacteria (diazotrophs) :Azospirillum, Klebsiella, Pantoea, Herbaspirillum, Bacillus, Rhizobium etli and Burkholderia.
Maybe they're findin it's good across the board moreso than others..def wanna find out...but hey it's organic..non gmo type of green tech..so a good thing.