Using the Bike Angels layer in the Citi Bike app, you can see which stations are offering points for taking a bike away (black oval with an upward arrow) and which stations are offering points for returning a bike (white oval with a downward arrow).
You earn Bike Angel points depending on the pair of stations involved in your Citi Bike trips. See below for examples of how Pick Up and Drop Off points work and check out the current station scores at the Bike Angels web map! (must be logged in to see the scores)
|1 point: From neutral station to 1-point Drop Off||2 points: From 2-point Pick Up station to neutral station||3 points: From 2-point Pick Up station to 1-point Drop Off station|
|no points: Starting trip at Drop Off station||no points: Ending trip at Pick Up station||no points: Starting trip at Drop Off station and ending at Pick Up|