That pic is of Elky, and yeah he used to be a starcraft pro and face off vs Koreans in their national sport if i am correct.
He was a top player, and believe me its tough in those online leagues. Dudes got game!
I can personally only do about 4 max on my screen, this is mainly because i dont like to have overlapping screens. I need to know that top left zone is where that is and it stays there.So 4 to 6 max is what i can fit on my monitor. It is also roughly the max i would feel comfortable with, but then again i dont have two monitors to try that fancy stuff out on!
I do agree that playing beyond like 4-6 you end up doing alot more robot like moves and only playing strong hands. This is good and bad, and also you commonly miss alot of information about the people you are playing with and moves they might make and so on.
I dont think its for everyone, but if i had a room devoted to poker with no distractions i would give a shot at playing like 16 or so tourneys simultaneously.
There are a couple reasons i think playing in so many tourneys is a good thing. Mainly in that you can grind down through the field in many tournaments at the same time. Which in the end might allow you to focus on say 8 of them near the end if you are doing really well in them, if you do really well in all of them then thats great too, but quite rare. It will in the long run allow you to have more chances for playing well to sorta pan out over the long run.
In other words for time spent, you will give yourself more shots to hit the final table in like big MTT.
Ok better get back and focus on my Freeroll!