Yes, I definitely endorse editing summaries into long posts, both to help future readers and to establish good norms for other posters! :-)
For the EA Survey note, I was responding to this part of your post:
It may be the case that an even broader platform that applies to the entire EA community, encompassing all community members and EA organizations, would be even better for increasing the impact of the effective altruism movement.
I don’t know whether the Survey would welcome questions about projects, but you could ask. I’m thinking of something like: “Have you ever worked on an independent/volunteer EA project that wasn’t run by a larger EA organization, whether or not the project is still going?”, and then, if they say “yes”, a link to a spreadsheet/form where they can add some details. The exact wording of the question will be determined by the way you decide to define “project”.
The purpose of a survey question would be to catch lesser-known projects, including some that failed—there are still lessons to learn in those cases. Gathering data on something like the early history of currently successful orgs would look very different, I imagine.