Exactly. This initiative might not pay, but if Jack had been involved then her name would have been all over the news next to Tom and Marcus. Ultimately, this is good for her brand, and next time some wanky marketing executive is looking for a face that fits their budget/healthy campaign, they'd be like "how about that smol pixie who did the thing with Marcus Rashford?"If she genuinely was part of this initiative she would be shouting it from the rooftops. It will be a successful campaign, and one that will run and run. She could have had been a part of something big, something truly inspirational, if she had a better attitude and work ethic.
She doesn't understand the bigger picture, does she? Sometimes by doing something that is altruistic it leads to other things. Despite her protestations, and stating how much she does for free, she only does something that benefits her directly.
And then she could recreate the Money scene from Cabaret in the living room of her crappy bungalow.