the fee is higher than billing
Bitcoin network is congested now because Binance is reorganizing its wallets/funds. This makes the transactions made from yesterday to the next few days have bigger transaction fees.
Because i've experince when send bitcoin need atleast 5-10 minutes to confirm on blockchain. If without confirmation, the new user must know to do not seting the fee more than 1 satoshi.
You can look into
https://mempool.space and compare block times with the moment you've sent the transaction. Sometimes blocks come faster, sometimes slower. The 10 minutes is an average.
Plus, the time is counted from a previous block, not from the moment you send transaction, so you can get lucky now and then.
1. I am curious, is there need a blockchain confirmation?
A transaction without confirmation doesn't matter; so I'd
guess that at least 1 confirmation is needed.
2. Where a 740 sat go?, to treasure forum?
I have no experience with that fee, but probably it's going to forum's treasury, in a way or another.