I absolutely have bothered to try and gather 'numbers' to get some perspective for comparing different platforms, but it's become easier and easier to not care about any of them.
I can understand it as an anxiety when you're trying to monetise stuff - like, do I have that much reach here? Who knows! But I need to make sure spending money on artist alley isn't throwing my money down the tubes!
to that end, i have a solution for businessfolk: start putting query-params at the end of your url that says where the source came from, and then start monitoring site traffic on your landing page to track your kpi's.