(*) This means that the fee is not fully unlocked upon stream creation, but it is gradually unlocked over the course of the stream.
It is important to mention that the fee is charged on top of the amount that is streamed, e.g. if 100 BTC is streamed, the sender account will be debited by 100.25 BTC.
(**) Solana network charges storage rent for the account creation.
Rent is calculated per storage byte.
(***) An escrow token account is created upon stream creation. When the recipient withdraws all of the tokens, the escrow account will be closed and rent will be sent to the Streamflow treasury account.