dap-addict wrote:Glad you understood that, avan, because I didnt:
So does that Best Recent Scenes Ranking than only work for the first 24hours, do I get this right?
Because, after 24h the scenes are listed and predicted in Best Selling Scenes of given month, now January 2021?
Well you claimed Giorgio explained it, although he didn't fully explain. Also the link you posted appears incomplete for some reason.
I think both "Best Sellers" and "Best Recent Scenes" pages work on the same data set, but apply different algorithms.
Specifically the "Best Recent Scenes" attempts to extrapolate a sales rank from hourly sales data during the first 24 hours.
However, the "Best Recent Scenes" also includes scenes which are 2 weeks old or more. I doubt it is re-evaluating 2-week old scenes every hour, but who knows?
I guess it is doing approximately what K9P said, comparing early hourly sales with an "expected sales" curve derived from historic data and ranking scenes according to how far ahead of or behind the average sales curve they are.
How they derive the expected sales curve when individual scenes differ in so many ways, is either very clever, or not.
Personally I just look at the "Best Sellers" list after the scene has been out for > 24 hours.
I guess the "Best Sellers" list for the current month simply derives an average daily unit sales per scene by dividing total units ever sold into number of days since release. Therefore it needs at least 1 day of data.
I don't know if they "smooth" the data to compensate for the early sales rush on release, otherwise scenes would tend to start with a high rank and then slip down the order as more days elapse with declining daily sales.
I guess that after a certain number of days they expect "run-off" sales to be negligible compared with the accumulated sales total, so they just count total units ever sold. Perhaps this would apply to historic months if you go back and search.
But again, that's just my guess about how it might work. I don't know any more than anyone else.