The days after the halving tomorrow and before the difficulty adjustment in about 5 days will be brutal for fees with the Runes added in. It will likely take some weeks after the difficulty adjustment for fees to settle out to a new normal.
Why?
First, the difficulty has nothing to do with the amount of spam those guys throw at the chain.
If you think that there will be a massive block slowdown that won't happen in 5 days either, because 2/3 of the period has passed, so even if we are going to see something like 20% down instantly it will only last 6 days out of which 4 are doing the weekend.
Costly, a big clog, maybe, but in no way brutal.
Plus I'm not even convinced about that 20%, we just had 4% up previously, and even right now we're 2% in the green with faster blocks, as I said in the speculation topic, my bet is on at max 10% during the first adjustment.
However, in this case, I checked some of the inputs, and all of them were funded earlier this month. It makes me curious why someone would waste so much money this way.
Did the same, 14 out of 15 were funded 2 days prior and the only activity on those addresses was one funding tx.
So maybe a casino/cex/something collecting user deposits?