Jed Cullen/Dave Benett/Getty Images; Amy Sussman/Getty Images Joe Alwyn and Taylor Swift’s love wasn’t forever — but his financial gain from their time together might be. Alwyn, 33, cowrote six songs during his longtime relationship with Swift, 34, under the pseudonym William Bowery: “Exile” and “Betty” from 2020’s Folklore, “Champagne Problems,” “Evermore” and “Coney Island” […]