1. Returns
Returns will be posted on the last day of every month. A report will be generated and and posted in this forums. The administration fee will be 20% of profits each month. Another 10% of the monthly return will be put into a reserve fund (this reserve will be traded). No administrative fees will be deducted if there are no returns for the month.

2. Withdrawal of profits: NO FEE
The withdrawal request must be made within the first 3 days of the month for payment the 4th to the 7th of the month. You can withdraw the profit of the previous month without a fee.

3. Withdrawal of principal: 10% or 20% fee
To withdraw the principal the member have to send an e-mail to contact@megainvforum.net with his User ID and password. Withdrawals can be made after 30 days of the initial deposit. A 20% admin fee will be assessed to all withdrawals. This fee will be reduced to 10% after 90 days. The reserve fee will always be 10%. A balance of $100 must be maintained in the account at all times. However, a member can withdraw the entire balance at any time if he or she wishes. Remember that there is a fee of 10% to 20% when all or part of the principal is withdrawn.

I know from Managed Accounts that Traders take from 20 up to 30 percent commission from the net-profits they produce. That is their income from trading the Managed Account.

The Admin of MegaInv chose to do it this way.
He could have chosen to calculate the net profit, then subtract whatever he likes to keep for his personal income from it, then publish the net-profit for the members.
In that case he would not take a fee for withdrawals.

This is the way I understand it.

Taking 20% fee when asking for a refund of your principal must be a signal to members to tell them they better not withdraw their principal.
He could have chosen to lock the principal for 6 months, but he chose to motivate the members to keep the principal in the program this way.

Hope this helps.

How much fees are involved when members does any withdrawal of returns or principle?

Withdrawals can be made after 30 days of the initial deposit. A 20% admin fee will be assessed to all withdrawals. This fee will be reduced to 10% after 90 days.

20% admin fee to withdray money?! This needs clarification.