the original story on SEL outlined some of the smaller details and intricacies of what is happening here. Namely that Google and Bing signed their firehose deals with Twitter at the same time for the same contract length, but only Google has been shutoff now - which suggests that Twitter and Google couldn't come to an agreement for some reason (but I doubt it was financial)

I thought that was an important point in the original story[1], but Mashable didn't copy and paste that far down

[1] http://searchengineland.com/as-deal-with-twitter-expires-goo...