I really don't know how some entities determine what fee
rate to pay for transactions. In the block that LoyceV mentions the fee rate for transaction
1bceacc5...5b838bbf stands out as completely overpaid and unnecessarily high. Apparently the payer doesn't mind and care to waste coins.
The previous block wasn't full either, emptied the mempool and in a few seconds of mempool lifetime not so many new transactions poored in (a very brief check showed that basically all transactions were public and seen in mempools).
At that time there were regularly non-full blocks, so I would have paid a fee rate of 1.00 or max 1.10 sat/vB when I wouldn't need my transaction to be in the next block for sure
, but confirmed within a few blocks max.
Paying sub 1 sat/vB is a bit new (I know and transacted in the early days of Bitcoin where there wasn't a minimum relay fee rate of 1 sat/vB) and not all wallets will publish such a transaction. Exporting a signed transaction hex is a workaround, but extra steps.
I think I'm going to lower my node's minimum relay fee rate to something realy low (for fun) now that sub 1 sat/vB fee rates became sort of a trend.
Not sure though if my node's peers do the same. It would be interesting if my personal mempool receives such transactions and if my node can relay those, too.