For my notes from another site:

Depending on the number of participating Crews, the payout will be as follows:
1-4 Crews: Top 1 paid
5-9 Crews: Top 2 paid
(1st: 70%, 2nd: 30%)
10-14 Crews: Top 3 paid
(1st: 50%, 2nd: 30%. 3rd: 20%)
15-19 Crews: Top 4 paid
(1st: 45%, 2nd: 25%, 3rd: 18%, 4th: 12%)
20 or more Crews: Top 5 paid
(1st: 40%, 2nd: 24%, 3rd: 16%, 4th: 12%, 5th: 8%)

You can also find the payout structure on the Crew Cup League page once the registration for each month is closed, the PS Points will be paid out manually once the monthly league has been finalized. 10% of the entry fee (=300 PS Points) will be withheld to cover expenses.
How does the scoring system work for Crew Cup Points?
In a Crew Cup event the rank of the top three finishers in each crew will be added up. The winning Crew will be the one that has the lowest total.
Example: Two crews competing in a Tournament:
Top 3 Crew A finishers: 17th 25th 36th = 78
Top 3 Crew B finishers: 1st 60th 117th = 178

Crew A will finish in 1st and Crew B will finish in 2nd.


What happens if less than 3 crew members end up playing in a Crew Battle?
Crews with less than 3 members playing in an event will be issued extra scores to simulate 3 participating members on the crew. If a crew only has 2 members playing in a crew competition tournament their crew will receive a 3rd score equal to a last place finish plus 1. If a crew only has 1 member playing in a crew competition tournament his/her crew will receive a 2nd score equal to a last place finish plus 1 and a 3rd score equal to a last place finish plus 2.


Can I leave my Crew voluntarily or can I be kicked off the Crew?
Yes both is possible, however if your Crew is currently in an active Crew Battle competition, you will have to wait until the end of the month to leave your Crew. Same applies for the poll that Crew captains and members with admin rights can create on their Crew homepage to kick off a member.