I think that sending something generic like “I’m not optimistic about [org] impact”, or even a very neutral review, can give some information without a significant litigation risk.
I would also consider an extremely positive review a useful signal, especially by ex-employees or ex-volunteers.
I think I would personally find it much more informative than a glassdoor review, after hearing a lot of very negative stories about Glassdoor (including yours).
I think that sending something generic like “I’m not optimistic about [org] impact”, or even a very neutral review, can give some information without a significant litigation risk.
I would also consider an extremely positive review a useful signal, especially by ex-employees or ex-volunteers.
I think I would personally find it much more informative than a glassdoor review, after hearing a lot of very negative stories about Glassdoor (including yours).