Graph 4: Dollars and hours to participants. This bubble graph depicts average weekly inputs in terms of dollars and hours to participants averaged over the time period program implementations reported. The size of the bubble, and corresponding number they are labeled with, show how many new account creators contributed to the projects through each reported program implementation. The location of the bubble in relation to the x- and y-axes illustrates the weekly average US Dollars and Hours input into each program, per participant, for its reported duration. Here we see that the the two bubbles lowest along x- and y-axes demonstrate the least inputs per new account creator. Other bubbles on the graph illustrate the variability and potential high inputs expended per participant in the other reported program implementations.