Jack Dorsey, founder of Twitter and Square, said on April 7 that he would donate more than a quarter of his wealth for Covid-19 relief efforts. Photo: AFP
Jack Dorsey, founder of Twitter and Square, said on April 7 that he would donate more than a quarter of his wealth for Covid-19 relief efforts. Photo: AFP

Billionaires: Twitter's Jack Dorsey pledges $1bn of his Square stake for virus relief