@tranthidung, you have done a good job with your analysis on how this campaign has gone so far in terms of  the payment made and the post by the participants. Am sure you are either an Economist or a Statistician. Can you please go further with your analysis by applying Regression technique so that you can come up with evidence as to whether there is a positive relationship between the Regressor(increase in gambling participants) and the Regressand(signature campaign participants post ) so that the owners can make an informed decision on either to extend this campaign or not.