Right, the start player card doesn't rotate or move. Just there as a remember who started the game.
It's irrelevant as there are no "rounds" in the game. People just keep taking their turns either placing their workers or retrieving them.
Not entirely true... it's to remember who started the game as players keep playing till EVERYONE has had equal turns. Getting past 10 points only triggers the game end, others might be able to take a turn and still beat them.
During play testing several people said they'd like a start player token to remember who took the first turn.