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The demographics of Kbin | Survey
(take.supersurvey.com)
/kbin-related stuff. Unofficial, not moderated by devs (yet). Official ones: /m/kbinMeta /m/kbinDesign **All official /kbin magazines in one collection**
Maybe try Google Forms? https://alternativeto.net/software/google-forms/about/
Check that it doesn't reveal individual answers first I guess.
Might be a good idea to edit your original post as well, so people don't keep entering data in vain.