Yes, money laundering comes the first thing to my mind too but at the same time, why should they want to launder money via this way? Everyone sees transactions like this and the media immediately starts publishing articles about how someone paid enormously high transaction fees. It's a huge disaster for someone seeking to launder money.
It is not the best way of laundering money but as I said before, seeing the transactions is not enough to convict. Sending coins to a miner as tx fee turns them into legitimately earned (aka clean) money since it would be part of the block reward (aka virgin coins). No court of law can
easily prove that the miner was in on the laundering.
The only argument that could be made against the laundering assumption is that when a block is mined by a "pool" the reward is split between all the miners that participated in the mining which may include a lot of regular people without the link to the pool. Which makes it an unlikely laundering situation.
However, Foundry USA has its own farm and its own hashrate and in case this were indeed a laundering case they could find a way around that as well.
They are buttcoiners, not Bitcoiners, and they can continue like this in future. If it makes them happy about their missing chances to invest and get rich with Bitcoin growth, it's good for them and I wish that they will find that happiness actually.
Usually these people are bag holding some altcoins and have lost a lot of money in the past that has made them bitter.
They are very funny though.
