Thanks for leaving a comment. I believe that while there are some people who use donations for purely self-interested purposes, there are also those who donate chiefly for charitable reasons.

For example, Andrew Carnegie paid for the construction of Carnegie Hall, John D. Rockefeller donated $80 million to found the University of Chicago, and Mark Zuckerberg donated $100 million to the Newark public school system. Even if they reap some benefits from their donations, the rest of society also benefits greatly.