Comcast reports its third-quarter earnings before the bell Thursday. Wall Street will once again be focused on subscriber numbers and growth for both broadband and streaming platform Peacock.Investors in recent quarters have homed in on the broadband business for Comcast and its cable peers, as customer growth has stumbled. Comcast executives have pinned the slump on a slowdown in the buying and selling of homes. Competition has also ramped up from wireless providers like Verizon and T-Mobile.Despite the sl ...