"Dropped" has long had meaning in English, referring to a delivery. "I dropped it off at the shop". Hence the term a "dropbox" - aka a longtime term for a place

"Dropped" has long had meaning in English, referring to a delivery. "I dropped it off at the shop". Hence the term a "dropbox" - aka a longtime term for a place you can receive deliveries. The online parlance is obviously stretching that definition a bit thin - but using the term "drop" can contextually be more specific than simply saying something was "added" or "released".