The mass complaints work very well when backed by an organized effort to lobby, press attention, etc. There are people vulnerable to political and social pressure who make decisions based on this stuff, e.g. the CA attorney general (in the case of ICANN)
It was ICANN which approved contract removing price limits, not Internet Society. (of course probably all of ICANN/ISOC/PIR/Ethos were involved in the deal, but anyway this statement is incorrect)
I wonder how effective these copy-pasted mass complaints to organizations/politicians/etc. are. It seems to be just waste of time, it's not that receiving same mail X times gives additional information?