By "streamers" and "constant soviet play" you mean who exactly?
HelpingHans that plays exclusively germans?
Luvnest who plays germans?
Cataclaw who plays both?
Stephenn who plays both?
VonIvan who plays both?
VonKluge who plays both?
Jesulin who plays both?
List goes on and on and on.
Sorry to burst your delusion bubble, but most known streamers play either both or germans 90% of the time.
VonKluge SNF world champion 6