Below from Billboard:
Pandora & iHeartRadio Subscription Streams to Be Added to Billboard Charts
The streaming services’ paid tiers will be included on Billboard Hot 100 & Billboard 200 charts, among others.
Billboard is expanding its stable of streaming contributors to its charts, as subscription streams from both Pandora and iHeartRadio – provided to and powered by Nielsen Music– will be included in chart calculations beginning with the rankings dated July 14 (which covers streaming data from June 29 through July 5). That is also the week that Billboard will adjust how it applies on-demand streaming data to its charts, giving greater emphasis to paid streams over ad-supported streams.
Pandora, whose programmed radio streams have been part of the Billboard Hot 100 and other streaming-inclusive songs charts since January 2017, will now have streams for its Premium and Plus subscription tiers contribute to the Hot 100, Billboard 200 albums chart and other streaming-inclusive charts, including various genre rankings.
In addition, iHeartRadio streams from the service’s All Access and Plus subscription tiers will also be added to the all-genre Hot 100, Billboard 200 and genre-based song and album charts that employ the same respective methodologies, as well as the all-genre Streaming Songs chart and similar genre-based charts.. Plays from the streaming of iHeartRadio’s menu of terrestrial radio stations as well as programmed radio streams, are not part of any data being reported to Nielsen or Billboard and will not impact any chart rankings.