Why were market data fees charged to a sub-account instead of the master account?

When a master account has insufficient funds to pay for market data but a linked trading sub-account does have sufficient funds, fees may be charged to the Trading Sub-Account rather than terminating the market data. This will continue until the Master account has sufficient funds. Once this occurs, the original billing set up will occur.

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Can I transfer funds internally in between an Advisor master account and a linked trading account?
When will my funds be deducted for corporate actions requiring payment such as rights issue and shares purchase plan?
What is the minimum deposit to open an advisor account?
What happens with my market data subscriptions if I link my independent account to a financial advisor?