Firstly it makes a huge difference because when players are successful at successful clubs, they tend to be really quite hard to sign. Secondly when it's a club that they support, they're almost impossible to sign and thirdly, because they value the relationship they have with their support, they don't leave for free and sign for clubs that their support view as rivals.
I literally can't think of a comparable equivalent.
That's before we get into that ****ing advert.