0xKofi: L2 needs to pay gas and blob fees for publishing bulk transaction data to Ethereum

According to 0xKofi, L2 is required to pay gas fees and blob fees for publishing bulk transaction data to Ethereum. Usually, blob fees are minimal, and gas fees are a major part of the cost. However, blob fees spiked yesterday, accounting for 21% of the cost of L2's bulk release that day. This is because the number of blobs submitted per block briefly exceeded the blob "target".