Only 17 people on the Forbes 400 list of the wealthiest Americans appear on this year’s Philanthropy 50 list—what does that mean? https://www.philanthropy.com/article/forbes-400giving/242458?cid=pt&utm_source=pt&utm_medium=en&elqTrackId=9296912395c94fe5b2f7e0fd6fa84a74&elq=483395b461d7410dbafd373e330423a1&elqaid=17773&elqat=1&elqCampaignId=7845