Board Thread:Game Discussion/@comment-37667252-20181219071145/@comment-37295703-20181219075324

As far as I know, you should be able to maintain the bonus and any crew member if you quit / force stop the app during the racing. Abandoning the race midway will cost your crew, but I am not sure about the bonus. You can also restore bonus and crew member if you cloud restore to a save in which you haven't used the bonus.

Hope this helps