As the title says - when joining a game show people stars in jump range, not just scan range. With only stars in scan range they cant properly pre-load their moves for the start of the game and are a significant disadvantage if the game starts at an inconvenient hour.
Just playing a game now where I thought I only had one way out from my start. Loaded all my moves then when I came back in the morning after the game started all my ships were charging in the wrong direction and 3 more routes out were visible on the opposite side.