Peacock's soft launch — when it became available to XFinity users exclusively ahead of its national expansion on July 15 — NBCUniversal's ad-supported streaming service has amassed 10 million sign-ups, TV Guide has learned.Per Deadline, in a conference call on Thursday, NBCU chief Jeff Shell cautioned in that it was still too early to parse whether those subscribers would become active accounts, "but across the board we're better than expectations." Shell continued, "We didn't expect this many