No.
The way it works is that a charity will sign a contract with the Mobile Giving Foundation to have access to the platform, and that charity will get an invoice from the Mobile Giving Foundation in exchange for that access. The amount of the donation is passed through from the mobile provider to the foundation at 100% and then subsequently passed on through the charity at 100%. It's also, I should note, tax exempt. It goes onto their bill, but not until after the tax is calculated.