There is no limit to how often a strategy provider can withdraw commission. However, please note that commission is only credited to a Social Trading Commission account at the end of a trading period.
The Social Trading Commission account is a Standard account automatically created in the strategy provider’s Personal Area for the purpose of receiving commission at the end of each trading period. There are no limitations on this account for withdrawals, or even transfers to other trading accounts, so long as there are funds available for this account.
Follow the links if you would like to know more about how commission is calculated or how commission works for strategy providers.