That’s not what this person is saying. What they’re saying is that the miner (in this case the same person as the sender) signed a transaction with an insane fe

That’s not what this person is saying. What they’re saying is that the miner (in this case the same person as the sender) signed a transaction with an insane fee and kept it private. The miner then solved a block. Finally, the miner then includes their transaction in the block because they’re allowed to pick what transactions to include. This would only happen for a “memey” reason because the miner is technically losing out on a transactions worth of fees but it does generate headlines like this which I would say would be worth $1-3. Not likely what happened in this case but theoretically possible with the technology.