So, I have no idea why we didn't start this 10 years ago. I blame @valiantman . We've taken snapshots, but we've never even attempted to do a methodical analysis of the ratio of newsstand copies to Direct market copies.
Here's what I propose:
First, we nominate, say, 10 books, one or two from each short time period, from 1977 to 2017, when DC finally pulled the plug on their newsstand sales (Marvel let the ax fall in 2013.)
Then, at or around the beginning of each month, we tally