Convincing Facebook team regarding a bug being valid

I recently reported a bug to Facebook that allowed finding the exact amount donated by people in Facebook and Instagram fundraisers even if they choose to hide it. Initially it was triaged but later they said that it is working as intended. Can anyone suggest me some points to make my case stronger in front of Facebook team. Especially if someone has read about similar bug being paid by Facebook, please link to it. It will certainly strengthen my case.

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