Earlier quoted context omitted.
It is, by definition, censorship. It's not _government_ censorship, but it's still censorship.
Yeah, but so what? Companies need censorship to make money. They shouldn't have to lose money simply to satisfy your or my idea of not censoring. Now the government? Yeah. That's a whole other issue.
Consider the situation in Australia, where all ISPs acted in concert to block websites. It's technically not government censorship, but the effect is the same - so any utilitarian rationale behind restrictions on government censorship should apply here equally.
Or maybe this should just be considered a form of illegal cartel.