They should be completely separate. Call me old fashioned but I will never wrap my head around how any number of streams is equivalent to an actual purchase of a song.

And now, we have no idea how much a song has sold anymore because almost every country (especially ones where sales have taken the biggest nosedives) includes streaming in their certifications now and have even inflated their certification levels, so now so many songs that are certified probably haven't even sold half of what the certification amount actually is. It's extremely misleading and now we truly have no sources that will help us to figure out the true sales of these songs, tragic.
