At the peak of the tech boom in August 2021, sports tech giant Genius Sports snapped up Spirable, an ad tech start-up founded by two Irish brothers, paying $37.5 million upfront.  Genius Sports, a London-based company that sells data and live game video streaming from sports events to media and betting operators, was on the crest of a wave. It had secured the National Football League’s official data rights in the US and had, earlier that year, merged with New York-listed special purpose acquisition company (SPAC) dMY Technology Group in a deal that valued Genius Sports at about $1.5 billion…