Billboard has announced changes to its chart rules for the Billboard 200 albums chart, Hot 100 singles chart, and other album and song charts.
The US chart compiler has changed how sales are counted with regards to album bundles (albums that come with merchandise and concert tickets purchases), and instant download sales attached to purchases of physical albums that are delivered at a later date.
When consumers are buying merchandise or gig tickets, they will now have to select to "opt in" the album as part of the purchase.
Bundles where the album is included as part of a "baked-in, single price option" will no longer be counted towards the charts.
Read more on officialcharts.com