As I recall the Steam was forced upon Oleg as was the name Cliffs of Dover, just before release from UbiSoft.
Ubisoft is the distributor and owns rights of distribution, except in Russia.
Good luck with your whines and complaints with UbiSoft.
It was too much trouble to separate the Russian version from UbiSoft requirements.
It was best action to go along with UbiSoft for best distribution of COD.
"You can't always get what you want"