1) Do you mean you want sponsors for your stadium name? You seem like you just want the stadiums to have proper names instead of [CLUB NAME]'s Stadium. You can change the stadium name for 5T on the stadium page, in the row above the build button. Not sure about the mobile app, though.

2) Betting has been suggested before. The reasoning was that T11 is supposed to a football management game, not a gambling game.