FILE- In this Sept. 20, 2016, file photo, Facebook CEO Mark Zuckerberg and his wife, Priscilla Chan, prepare for a speech in San Francisco. The Giving USA report, released Tuesday, June 12, 2018, said giving from individuals, estates, foundations and corporations reached an estimated $410 billion in 2017. The biggest increase was in giving to foundations, up 15.5 percent. This surge was driven by large gifts by major philanthropists to their own foundations, including $2 billion from Zuckerberg and Chan. (AP Photo/Jeff Chiu, File)
FILE- In this Sept. 20, 2016, file photo, Facebook CEO Mark Zuckerberg and his wife, Priscilla Chan, prepare for a speech in San Francisco. The Giving USA report, released Tuesday, June 12, 2018, saidShow more

Free gifts and forecasts: the murky world of Facebook research support