In 2018, Billboard's charts will give more weight to streamers like Apple Music, Spotify and Amazon
Album based charts produced by Billboard, such as the 200, use only on-demand streaming, both paid and ad-supported. Video streams, which do count in the Hot 100, are ignored for the Billboard 200. But these different calculations are going to change starting next year. In 2018, the paid streaming services like Amazon Music, Apple Music, and the paid tiers of Spotify and SoundCloud, will get more weight in calculating the Billboard charts than the ad-supported services and tiers.
Next year, the Billboard Hot 100 will include results from paid subscription streams, ad-supported streams, and programmed streams. These streaming results will combine with radio airplay and digital sales to make up the Hot 100. Meanwhile, the Billboard 200 will include results from paid and ad-supported audio streams. Video streams will not be included. This chart lists the most popular albums of the week based on traditional album sales, streaming equivalent albums and track equivalent albums.
Billboard says that fine-tuning the charts in this manner "better reflects the varied user activity occurring on these services."
source: Billboard via BGR