Pep Guardiola won it five times.
Do you think he was doing it for the prize money?

Possibly because his B team reserves are better than everyone else's TBH?
SCENE:
Pep Guardiola stood watching his first team being put through their paces at the training ground.
Sancho Fray Bentos (Development Squad Assistant Secretary): "Boss?"
Pep Guardiola (turning): "Yeah? Who are you?"
SFB: "Sancho Fray Bentos. I work for Gunduman Runduman, the Development Team Coach. I've just dropped his kids off at school and he asked me to swing by here just to inform you ..."
PG (turning back to the training): "Foden! FODEN! Fucking RUN! Pass ... and run! Tikki-fucking-takki! (turning to SFB) "He's fucking rubbish! You lot can have him ..."
SFB: "Erm, thanks ... Mr Runduman sent me to tell you ... "
PG: "Who's he?"
SFB: "The Development Coach."
PG: "?"
SFB: "We are through to the next round of the Carabao Cup. The semi-finals!"
PG: "?"
SFB: "It's the big, ugly looking, three handled cup that nobody wants!"
PG: "And so ... sounds like not my problem ...?"
SFB: "We have Liverpool in the semis."
PG: "Sounds like not my problem."
SFB: "Mr Runduman asked if we can have some good players for the semi finals and a full squad of firsts for the finals."
PG: "Do I get to be on the telly? In a thin sweater? Stubble? Charismatic interview? Loads of chicks swooning? And we win?"
SFB: "Si."
PG: Consider it done. You can have Foden for the semi and this lot for the final. Not Haaland though. Or Dias. And only half a game for Gvardiol. Rodri ... last ten ... Semenyo ... he can start but he gets subbed on 50. Foden ... full game plus extras but no pens. Now, fuck off ... "