Songs are constructed that way nowadays; iirc Old Town Road or one of those were crafted in such a way that it's missing a hook at the end, and the hook is just over 30 seconds (or 1 minute) long, making people more likely to replay it for the hook and for the song to reach the threshold to be considered "played" on services like Spotify, artificially boosting their statistics / popularity. Can't find a source right away though, so take my claim with a grain of salt.