I have gotten feedback on my admonymous a total of 7 times, in the ~year that I've had it.
I haven't really properly solicited that feedback at any point, just had it passively linked on my social media & Slack profile.
I'd say none of those 7 feedback items were really really useful, but they were mostly a bit useful, and often made me feel happy/good to know.
Proposing an improvement to otols like this -- suggestionh bounties w external judgment and/or 'enforcement' -- https://forum.effectivealtruism.org/posts/oxFncTiAaHBJCgBZP/anonymous-suggestion-boxes-with-a-committed-reward-pool-and?sharePopup=true