Okay..., God has poured out his spirit on non-Oneness flesh for years. This is nothing new. We all know that. I've never heard anyone say if you're not oneness you cant get the Holy Ghost.
Fact is though, Oneness is still truth. And Jesus name baptism is still truth.
Jesus said the Holy Ghost
"will lead you into all truth" (John 16:13). Being in a church that preaches full truth is not in itself a prerequisite for receiving the Holy Ghost. Repentance and faith are the prerequisites. Now these people they are now in a position where hopefully they will
allow themselves to be led by the Holy Spirit into full truth... rather than hold on to man-made traditions (which, unfortunately, is what happens much of the time).
If they receive the Holy Ghost but still continue praying to Mary, baptizing in titles, etc..
they remain in error, and have not allowed the Holy Ghost to lead them into truth.