No conspiracy theory needed. There was a fee bidding war for getting into the 840000 block. All txs that didn't make into the 840000 block due to block-size limit didn't just disappear from mempool. So they spill over to further blocks.
20 sats \ 0 replies \ @senf 20 Apr
It's mostly runes. Block 840,001 had 4.4858 BTC in fees, then 840,004 had 24 BTC in fees.
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