YOU SHALL ALL DIE

There is a game called The Ship, and apparently it's really fun, although hard to manage (e.g. the single player, multiplayer and tutorial are all separate games). But for some strange reason, the developers decided to do this:

When you buy The Ship, you get 2 activation keys to send to your friends

So say I buy the ship and give it to 2 friends

Now 3 people have the ship

When you receive an activation key, you get one more to give to friends

The 2 people give the ship to 2 more people, and then they give it to another 2 people...

So I'm gonna try give this to the whole class, and when we're done with the class, the last 2 people can give their activation keys to anybody