Why is this particular transaction considered spam? I see a multi-sig paying another multi-sig and a miner. Sure, the dust output is weird, but how's that harmful?
Harmful? I don't think Bitcoin is harmed technically from these transactions. Bitcoin works as expected, increasing the fees. It was intentionally built to do this. The problem is that blocks like this:
https://mempool.space/block/00000000000000000002f83ab72267be24e81ec374b726f94d2ae784fcd9c442 are full of transactions where the output is a 546 sats UTXO.
Essentially the recepient won't be able to do anything with a 546 sats UTXO. At the same time, 546 sats is the minimum UTXO size allowed in Bitcoin, so it looks like people fill blocks with dust outputs.
P.S I didn't check the past of these transactions to see where the money come from, but it is suspicious, in my opinion.
Question for everyone more technically savvy than me: Could those be direct payments to the miners for some reason? Because if you think about it, you will see that these transactions pay for example 50,000 sats on fees (to the miners) and 546 sats to an address.