ukdm and russellholly are this guy: https://plus.google.com/106631699076927387965

http://www.geek.com/users/rholly/

http://news.ycombinator.com/submitted?id=ukdm

http://news.ycombinator.com/submitted?id=russellholly

mrsebastian is this guy:

http://www.extremetech.com/author/santhony

http://news.ycombinator.com/submitted?id=mrsebastian

maxko87 is an unknown who ran an autosubmitter for two sites one of which happened to be extremetech, till he got hellbanned:

http://news.ycombinator.com/submitted?id=maxko87

adeelarshad82 is their social media marketing guy:

http://www.linkedin.com/in/adeelarshad82

http://news.ycombinator.com/submitted?id=adeelarshad82

Then there's these guys who really love ziff davis properties:

http://news.ycombinator.com/submitted?id=11031a

http://news.ycombinator.com/submitted?id=memoryfailure

And this guy who just likes them a lot of the time, he may just be a regular karma whore if that is a real thing.

http://news.ycombinator.com/submitted?id=evo_9

That accounts for almost all Ziff Davis submissions.