You can ask the live chat on any one of those sites to give you the bonus on all three at the same time. Same with the Bingo Knights group. They share support and did this for me. Saves time and it's very nice of them to do this.
Just be sure it isn't Kenny from live chat. He wouldn't do it for me. But then, I should have known he wouldn't cos he's been like that in the past about certain bonuses.
I turned right around and contacted live chat again, got James. He credited the other 2 sites just like that.