They arent going to make an app just for one person to donate bro. The player count has gone up yes, but we still dont have alot of people yet, it would be a waste of time at the current moment.
I'm not the only person who thinks this... I have talked to other people about it too and they think it would be a great idea.
personally I agree with 42basketball. and app making can be done by anyone if you use the right things like a app maker. Some good ones I know of would be https://www.appmakr.com/index.php or http://snappy.appypie.com/app/creator-software/
The service we use to process payments would not work with what has been suggested here. This isn't going to happen.