From 2D Market:
Being a Magical Girl is not easy.
In addition to balancing their academic duties and fighting evil monsters, they must work hard to keep their real identity hidden from the public. After all, that’s common sense for every superhero type.
This explains perfectly why Reika was so willing to give in to blackmail and started paying money to a man who took photos of all the Smiles transforming.
Unfortunately, even a rich girl like Reika eventually runs out of money.
“Luckily” for her, her blackmailer had an alternative way for her to pay him in mind. The only question really is how far would Reika be willing to go to protect her friends’ identities.