I'm a 19-year-old Canadian at the moment and therefore can't realistically contribute, but this is exactly how I want to live and I would totally move to the Bay Area just for this.
I have taken the survey.
Only if they actually do it. It seems to follow that anyone willing to donate a symbolic dollar is already fairly likely to stay the course and therefore a low-priority target, whereas the people who wouldn't donate the symbolic dollar are also the easiest to alienate.
On one hand, I agree at least somewhat about the importance of preventing free riders. On the other hand, claiming that someone isn't a "real" effective altruist makes them believe they're less of an effective altruist, which makes them less committed to the cause. Conversely, every time a non-donating EA proclaims their EAness, it becomes a more integral part of their identity, raising their level of commitment to donating when they get income.
Without doing much in the way of research, which would spoil the game, I think the quote is urging people not to privilege the beliefs of the culture they live in. For example, many popular beliefs of the 1900's are clearly incorrect when viewed in hindsight; the logical conclusion is that, in a hundred years, many popular beliefs today will be seen as clearly incorrect by those future generations.
I can think of a few likely candidates off the top of my head. And sorry for the sesquipedalian loquaciousness. I keep trying to stop, but I can't!
Uh, did the survey a few days ago. Bit late to the punch, I suppose.