Full Length related record Sales
It sounds fairly logical to add together weighted sales of one era – studio album, physical singles, downloads, streams – to get the full picture of an album’s popularity. For older releases though, they also generate sales of various live, music videos and compilation albums.
All those packaging-only records do not create value, they exploit the value originating from the parent studio album of each of its tracks instead. Inevitably, when such compilations are issued, this downgrades catalog sales of the original LP. Thus, to perfectly gauge the worth of these releases, we need to re-assign sales proportionally to its contribution of all the compilations which feature its songs. The following table explains this method.
Remaining Long Format – Part 1 – Compilations & Remixes
How to understand this table? If you check for example the Greatest Hits: My Prerogative compilation line, those figures mean it sold 6,070,000 units worldwide. The second statistics column means all versions of all the songs included on this package add for 758,000 equivalent album sales from streams of all types.
The second part on the right of the table shows how many equivalent streams are coming from each original album, plus the share it represents on the overall package. Thus, streaming figures tell us songs from In The Zone are responsible for 33% of Greatest Hits: My Prerogative tracklist attractiveness, which means it generated 1,997,000 of its 6,070,000 album sales and so on for the other records.
Analysis-wise, the fact no album nor single is really a streaming monster creates a situation were sales of compilation are spread over all albums in a pretty linear way. The main benefiter is In The Zone. While the set was the weakest seller of Britney‘s first half of career, it contains her most remembered songs from the period thus being the main traction of Greatest Hits: My Prerogative package.