Carrie, do you still have the big list of ‘other inaturalists’? That might be something nice to have in a wiki here too if it’s something you can share.
I do, but seems that should be a different topic and/or just added to the spreadsheet (may lend itself to that better than a wiki). Here’s my original journal post on the topic, with a link to the spreadsheet of platforms similar to iNaturalist (it’s now far out of date, but I suppose now that makes it a source of historical data).