DarkdwarfI added it to my sheet and updated the OP. :)
Cheers sir.
Are the ESL stats included? I'm finding it hard to get information on the prize pools for those seasons/events:
http://www.vanillatf2.org/tag/esl/
There might also be a couple of EU 6v6 cups with prize pools donated by angel which weren't the Nations Cups.
I found many ESH cups. I've compiled a full list below (cash prizes only):
2010
2011
2012
ESH tournament search results for TF2
ESH TF2 match results (Some cups don't have TF2 in the name and you cannot filter tournaments by game)
Let me know if I buggered up any of the links or cash amounts. I nicked a couple of these cup names from GeaR's profile. There's a bunch of other cups listed there too.
Wireplay 6v6 Season 7 also had a £500 prize pool. I could see if b0nes has more info on other 6v6 seasons which included cash prizes.
I don't mind digging around some more if you want. There's plenty out there to warrant some form of joint effort, especially if you plan to include regions other than EU.
Perhaps some of the older timers could help with the ESL prize money?