Night mode is an automatic setting which takes advantage of the new wide-angle camera that's in the iPhone 11 and 11 Pro models. It's equipped with a larger sensor that is able to let in more light, allowing for brighter photos when the light is low.
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iTunes Exclusive Track Breaks Billboard Top 10
The track (iTunes Link) was "I'll Stand By You" performed by Carrie Underwood during last week's American Idol "Idol Gives Back" charity episode. Macworld reports that the song has been purchased over 100,000 times in less than a week.
Of course, while most of the boost in sales reflects the cross promotion from a popular television show, it still represents a notable shift towards digital music sales.