The app Hornet, which caters to the gay male community, has seen a 30-percent increase in social feed engagement since social distancing measures began in mid-March, according to CEO Christof Wittig. And the dating app Tinder reported that it saw more engagement on March 29 than on any other day in its history, with more than 3 billion users swiping to connect with people, according to an April 1 press release. In 2020, online dating revenue in...