HI, I was in division 1 for a couple of weeks last month. The prize money is something as follows:
D1 cup
winner: 3 million
2nd: 2 million
semi final: 1.5 million
quarter final: 1 million
round of 16: 700K
The fee per game is about 150K.
Someone said 600K but thats not true. Remember that quick match fees are practically irrelevant to fees for tournament games. The reason you get for example 400K for quick matches is because of what your own squad is worth & how much the squad of the opponent is worth.
The reason it is incredibly easy to make money in division 1 is because the tournaments are empty. In my couple of weeks in div 1 I played maybe 2 dozen tournaments, of which 9 or 10 had at most 3 players in total. The most filled division 1 cup I ever played had 6 people in it. Remember, this was last month so not like it was right at the beginning when barely anyone had promoted to div 1.
There's even been tournaments where just 1 person entered (the tournament still appeared on the list but you couldn't enter anymore) so that person just got a free win. The downside is you have to wait about 2 hours to collect your money as Konami weren't smart enough to foresee such situations.