Are any of the sites using FB events/analytics? It depends on what the non-profit sites are doing, but the Facebook rules for prohibited domains [1] seem to include what a lot of non-profits may do:
"Predominantly target or serve an audience likely to have suffered from mental, emotional, financial or physical harm, or facing severe economic hardship that directly affects housing, food security or freedom."
I'm guess if a single one of your non-profit sites does all the sites would be blocked. Apart from pleading with FB, using domains for each would be a better solution to stop this happening the next time rules change or one of your sites does something not allowed
That page says that if you have such a site, FB will stop collecting analytics/tracking data from the site. It doesn't say FB will block posts mentioning the site.
It sounds like what you're saying is that FB prohibits community organizers, labor organizers, and charity from using FB analytics — which honestly is maybe not a bad idea, because analytics amounts to a serious privacy leak, one which could especially negatively impact vulnerable populations.
"Predominantly target or serve an audience likely to have suffered from mental, emotional, financial or physical harm, or facing severe economic hardship that directly affects housing, food security or freedom."
I'm guess if a single one of your non-profit sites does all the sites would be blocked. Apart from pleading with FB, using domains for each would be a better solution to stop this happening the next time rules change or one of your sites does something not allowed
[1] https://www.facebook.com/business/help/851247612299604?id=18...