Yeah there was a time there where there was like one a week. Really sad. Game development is become more expensive and a bigger risk. We'll be at the movie industry style 5 or so mega studio model soon.
Our only enemy is the status quo. Our only friend is chaos.
Well, certain studios only had a finite lifespan from the start, as they were really only created to make one or two titles then disband or go back to their original studio. Some studios were legitimately awful / hemorrhaging money and needed to be closed. Others were actually awesome and closed down inexplicably or because they made one game that didn't meet sales expectations (which is sadly enough to do you in in this economy).
Overall, I don't think the list is all that surprising. Layoffs and closures are extremely common in gaming and it's even more common now with the poor economy and increasing development budgets needed to be competitive.
And there are multiple GameFaqs posters who say that buying games used and giving $0.00 to the developers is irrelevant.
I never buy used or sell games I've bought so whatever comes of this whole used games argument is completely non-consequential to me. However, the fact is the developers already make their share of the $60 on every game sold. Why should they get paid again when the game gets sold a second time when virtually no other product works that way?