Facebook gets a free pass because Facebook is an influential organization. Parler had no network of elites protecting it, because as you say, it had no other purpose beyond being 'volunteer' moderated.
If at a minimum, the attack gets us to think about the type of questions posed by The Social Dilemma, we're trending towards a better place.
No, Facebook devotes significant resources to moderation and makes good faith attempts to uphold their policies. Parler did not. That is the difference.
"If the negative externalities are the same in both cases, then this isn't an excuse."
No one is trying to rid the world of all negative externalities, only to make reasonable efforts to mitigate them. There may never be a perfectly moderated social media platform, just as there may never be a perfectly safe highway, and that is fine.
All sorts of industries have negative externalities (e.g., fossil fuels). But are Facebook's worth it if they destabilize the democracy in which allowed Facebook to grow and exist?
What's always missing here is that the outcome is still terrible and everyone is arguing from the premise that Facebook deserves to exist regardless.
If I maintain my rollercoaster in good faith but I just can't hire enough maintenance crew to do it well and people keep dying on it... maybe the rollercoaster doesn't deserve to be open and should be shut down.
If it's about intent, rather than results, then it's sure a big coincidence that Parler was deplatformed by Apple, Google, and AWS all within a few days.
https://arstechnica.com/tech-policy/2021/01/filing-amazon-wa...
original sources can be found within the article.
I do not know how many users they have per reviewer, do you?
Parler reportedly had a community "jury pool" system in which Parler users could volunteer to review reports for bad content and could decide whether to leave the messages up or not.
The Internet of the 1990's is still alive by the way. Anyone can put up their message on a website provided by a host of their choice.
They clearly have a dominant position now. Their disruption won't come from phones, just like their rise didn't come from phones either.