detecting large imports in an area

I’m doing some analysis on Osm history files. I’d like to be able to differentiate between ‘normal’ users and import accounts. As I’m analyzing region by region, I’d like to identify if and when there has been a large import in this region.
I could not find a table with these accounts, so I suppose other people used scripts to guess which accounts did importing.

Are you aware of the collection in the OSM wiki about ?

I assume that in documentation there, some user accounts used for big imports are mentioned.

That’s what I assumed too. But I couldn’t find anything like that. Maybe I could write directly to the DWG, but I don’t want to bother them unless necessary.