You can find informations about the adoption here:
http://wiki.openstreetmap.org/wiki/Quick_History_Service#User_Overrides_-_.22Adoptions.22
My experience of remapping was that I remapped a town in the north of Israel and after I did that the users that mapped it before has agreed the license, because of my emails!
Of course my work was not useless, as I found a lot of mistakes and could add a massive amount of streets to the area.
Instead of remapping big areas we should create a Hebrew template and use it to contact all undecided users again.
If I understand the stats correctly there where 8 users that accepted the license after my emails. But I send a email only in English.
########
I’m personally searching at the moment for edits of the user cetest and fixing it!