Again, I'll reiterate – the tournament probably depends on the skill level of the players. In a tournament with 32 players, the probability of having weak players is low, but in a tournament with 8 players, it's high (although the player base can vary).
Let's be more specific.
8 participants:
1. 200
2. 150
3. 100
4. 50
16 participants:
1. 400
2. 300
3. 200
4-8: according to the formula (we just need to calculate it with the coefficients)
32 participants:
1. 500
2. 400
3. 300
4-16: according to the formula
64 participants:
1. 600
2. 500
3. 400
4-32: according to the formula
Plus, let's not forget that all games contribute to the overall score.