Thanks for the article. I'll throw in my two cents on one point:
"The project stops new sign-ups for a period greater than 5 consecutive days"
Just yesterday I tried adding YAFU from the BOINC manager and discovered they are not accepting new accounts. This project is currently whitelisted. I want to add that to this discussion because I am not sure why they are not accepting new accounts; if there is an essential reason for doing so, that must be factored into drafting whitelist requirements.
[also, I want to make sure it is in fact the case that they are not accepting new accounts, and not some bug with my local BOINC version or otherwise.]
You need to use the invite code "yafu".
Some projects have invites enabled but put the code on their homepage to help stop spambots signing up.
I don't see a place to enter the invite code?
Sorry, I don't use boinc manager for adding accounts, I do it through BAM.
You should be able to add the account on the yafu website though, just remember to use the same sign-up details as your other projects.
https://yafu.myfirewall.org/yafu/create_account_form.php
You're right, I was able to create an account through the website. Thanks a ton!!