I know using LivePopBars and Kworb, we can see popularity numbers / percentages for how songs are selling in the chart but why not ALBUMS?

Is there any reason for this?

Because albums aren't selling for **** anyway

umm they dont show such data that can be tracked from the very beginning

most people use ichunes for singles.

I think iTunes represents the majority of ALL single sales whereas it represents a small percentage of album sales for most albums.

For instance, Azealia Banks was top 10 on iTunes the entire first week of her release and she sold 11k

iTunes album sales are the pits, unless you're Taylor Swift or Adele.

Probably because there's physical copies of the album that has to be taken into consideration

And we don't get a breakdown of how much was physical/digitally bought