About 75% of Pandora’s streams go to “mobile and other non-traditional devices.”
Online streaming from traditional computers will not be affected by the new monthly limit.
Pandora imposed a similar 40 hour cap in July 2009, though it affected all computers and mobile devices. That limit was raised in 2011.
Only about 4% of Pandora’s users are expected to be affected by the new limits. They will be notified when the 40 hour point is reached, and can pay an additional $0.99 to continue listening until the end of the month.