I, like all the other trust account members, will be opening unlimited subaccounts for BTCST, as detailed in Pirate's Trust Account FAQ.
Although standard subaccounts will not be open until I have access to the new BTCST website, which will have subaccount functionality, insured subaccounts are open NOW.
If you got a better insured rate from me before this thread was started, your rate will be guaranteed until the next repayment.
Rates will vary from 2% to 4.9%.
I will also be operating insured subaccounts at much lower rates (1% to 2% weekly depending on your account balance):
100 to 500 BTC: 1%
500 to 1000 BTC: 1.5%
1000 to 4000 BTC: 2%
x to y means [x, y)
Insured subaccount owners are allowed to withdraw after one month for ease of accounting, but when the new website is released, this restriction will be removed.
Insured availability: 0 BTC