In June, the pop artist Charli XCX released her sixth studio album, "Brat." A few days later, she released a second version, with three more songs, and cheekily called it "Brat and it's the same but there's three more songs so it's not." Some speculated this was a dig at Taylor Swift, whose album rereleases have drawn criticism by some who see them as a push to stay atop the charts. Really it was a nod to the same game many big artists are playing today: rolling out a tidal wave of iterations of albums and songs as they seek to grab attention and please the algorithmic gods on crowded apps like Spotify and TikTok.