You only need to go to YouTube to see example after example of fans at concerts using their cellphones to record part or all of the concert. It used to be that no recording device of any kind was permitted at rock concerts - not even cameras were allowed. Remember how Axl Rose got so upset when security failed to take a fan’s camera away from him that Axl left the stage and apparently a riot nearly ensued? Security used to stop you at the door to the venue and pat you down to make sure you weren’t trying to sneak something in, be it a camera, a tape recorder, a bottle of whiskey, or a weapon.
Why do you suppose it is that so many bands today are allowing people to bring cameras and recording devices into concerts when they used to be so adamantly against it? Do you suppose it’s because album sales and therefore royalties are already so low as to be nearly nonexistent that they figure nothing can make the situation any worse, to even allowing people to record their concerts? Or if not, then why do you suppose so many bands are allowing pictures to be taken at concerts and even video and audio recording of the concerts?