Trump's presidential library "foundation also raises money through PSQ Impact, a donation platform run by PublicSquare, a company whose board includes Donald Trump Jr."
Gabe Kaminsky for CBS News
https://www.cbsnews.com/news/trump-library-democratic-congress/
The foundation is a nonprofit.
The Trumps, of course, have a history of profiting off their nonprofit work.
In 2019, Don Jr. agreed to attend training on charitable work as part of the Donald J. Trump Foundation's settlement with the NY AG's office.
https://ag.ny.gov/press-release/2019/donald-j-trump-pays-court-ordered-2-million-illegally-using-trump-foundation
Donald J. Trump Pays Court-Ordered $2 Million For Illegally Using Trump Foundation Funds