I see the point you are making, and I agree with you- YES THEY SHOULD BE CHARGED WITH GANG RAPE TOO!!
But... lets just say they all had paid her each the $100 afterwards... what would we be calling this now?
Amazing that because of what she does, people here are unwilling to treat her equally under the law.
And appalling too.
If she agreed to take the money and didn't call the police, we wouldn't be talking about it. However, if she agreed to take the 100 dollars because she was afraid they would kill her if she didn't take it, we would still be talking about this, and it would still be rape.