With anonymous notes coming from an application, I don’t know if it would be possible to determine the number of open notes when they are closed, but coming from a mapper logged into the PC, I believe it would be useful to only create new notes with a certain number of closed notes or equivalent.
I think that history in Brazil shows that more notes are opened than closed and not mapped in OSM. So just creating notes does not solve the problem of having an updated map, on the contrary, it disregards the information that remains there in OSM without being added to the map.