12th Principle signatory growth rate plotted from Bill Caputo's JSON data. plot 
Unique in the manifesto, the 12th principle's subject is the containing organization, not the delivery effort itself. However, it neither prescribes nor promotes a wider organizational structure. Instead, it suggests to members of the wider organization what is needed in successful delivery environments. A mistaken belief that such environments naturally arise from deploying Agile has resulted in the erosion of the 12th principle as Agile spread beyond the ideals of it's founders; its rarity is a key element of the increasing claims that Agile has outlived its usefulness. We'd like to change that. site
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Bill Caputo cleverley asked for tweets as signatures which engaged that social network. He captured these and appended them to his manifesto. A flash crowd ensued.