[kazinator]

It doesn't. "Dropbox drops photo galleries" means discontinues. If that isn't the intended meaning of the statement, then language is being misused, plain and simple. Or it's some kind of Dropbox jargon not widely understood outside of Dropbox.

[zimpenfish]

If you're claiming that "drop means release" is "language being misused", the dictionary would like a word.

https://en.oxforddictionaries.com/definition/drop

(verb) 5.4 (informal) Release (a musical recording). (noun) 3. (informal) A delivery.