it's simple. what is delegated to you is taken back once you have your own minimum amount of 15 to play.
As for whale that chose to boost/delegate your account you will either pay your ties to your new messiah. If that was the arrangement or not and keep making your own money. But word of caution if you dont contribute back you may get revoked. I know that's I would do. I made you strong now give me my cut. I hope this helps. As I understand things. Could be wrong.
Mr. NicePost.