How does the whole bonus thing works really? Support is a very new keyword and it is a little confusing.
Support: Attack +3
Marco’s attack points are increased by 3 points for each character belonging to Marco’s clan and who is part of his team. Remember that Marco is also taken into account.
Let's take Marco as an example. Marco gets +3 attack for every Rescue clan cards you have in your hand. If I have a Marco and a Larry then both will get +6 attack. If I got two Marco and two Larry would all cards get +12 attack or just +6 attack?