After you beat conquest once And play again will stuff be hidden in map again
2nd inning conquest
Then why do people play conquest over and over just wondering
Because if you don't play online then Conquest is about the only game in town for grinding XP and Program Stars in a game setting. It is the only offline mode you can play and at least get a reward at the end, even of it is just a 10 pack bundle (which is the only prize that is repeatable).
Oh ok sounds fair so how long does it take to beat USA map on average
Assuming you only play the strongholds and win every game, it'll be 30 3 inning games. So time yourself playing a game with menus and load times, then multiply by 30. Add an hour or so for simming non-stronghold spaces as well as reinforcing.