Television executives, such as CBS president James Aubrey, sought to avoid any disruption in viewing habits which might cause viewers to move to another network. These weekly series, though, typically became too expensive for any single sponsor, so stand-alone shows offered a way to continue accommodating the single-sponsor practice, leading to shows like Amahl and the Night Visitors (1951, sponsored by Hallmark Cards as part of the Hallmark Television Playhouse) and the Ford 50th Anniversary Show (1953, a two-hour variety show simulcast on both CBS and NBC).[1][2][3]