Campos is also not as straight forward as you think.
The football leaks guy (who was later jailed) has insinuated that he earns his money at Monaco/Lille by taking a percentage on the capital gain made after selling players he had brought for cheap into the club.
He is also in bed with Mendes/Zahavi who would be paid a percentage on player resales.
I don't know how that model will be entertained at Real Madrid.