The way a football club sells more merchandise is by winning trophies, not by getting a basketball player to wear a shirt
If a team gets into a big final the game is shown live for 2 hours all over the World watched by football fan
Having Lebron wear an LFC shirt after a basketball game will sell some shirts but not a lot, most of the people who are watching couldn't give a dam about football and will buy a basketball shirt first
If Gerrard did an interview in a Red Sox shirt how many Liverpool fans would buy one, a few but not a lot
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