I didn’t read through this thread again, but the passenger pigeon was once the most common birb in North America, numbering up to 5 billion. They used to darken the skies. The last one died in 1914.
I’m pretty sure no iNatters would be complaining about “too many passenger pigeon observations” uploaded in the 1800s.
That should tell you everything you need to know about uploading “common” species.