Never faced it but would assume you get the points of a succeful cleanup since the cleanup had x amount of points available for killing x hero and you did that.
Plus as u said the others return to death at the end of the match and there were no points available for them
While yea upon first read seemed like quite the interesting hypothetical
It seems like it’s one that answered itself as it was being written
Seen it personally? Nope. But still 99% positive this is how it would work.