Free lecture: Release clause is like a penalty fee to free yourself from a contract. It is popular in Spain and it is not a players valuation.
Modric is 38 and has a €750m RC, Fed Valverde has a €1bn RC. With these few points of mine, your ignorance should be down by 70%
I wonder what they smoke at Barcelona, how do you buy a 32 year old for free and place a €400m release clause on him 😭