I think the point is that for NPS, we’re interested in what all effective altruists think, since they’re the users of the product. But EAG attendees are not likely to be typical effective altruists: they will probably be more committed, and more positive about EA than a typical EA is.
To continue the Apple analogy, it’s a bit like basing your NPS score not on everyone that buys a laptop, but on the people who comment most on Apple product forums: these people won’t be typical of Apple’s consumers.
I think the point is that for NPS, we’re interested in what all effective altruists think, since they’re the users of the product. But EAG attendees are not likely to be typical effective altruists: they will probably be more committed, and more positive about EA than a typical EA is.
To continue the Apple analogy, it’s a bit like basing your NPS score not on everyone that buys a laptop, but on the people who comment most on Apple product forums: these people won’t be typical of Apple’s consumers.