Most celebrities and other ultra-rich have set up their own charitable foundations mostly for tax benefits. They do not have to publish the financials for their foundations.
This from the Guardian:
Over the course of the year DBVL gave £1m to Unicef, the UN agency responsible for providing humanitarian support to children across the world, for which he is a goodwill ambassador. The donation helped knock the company’s pre-tax profits down from £14.8m in 2018 to £11.3m in 2019.
It's all about reducing profit on the books, and it makes the celebrity look good. I have so many questions about these charitable foundations, but we will never get to see the books on them.
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