2

...could conceivably broadcast a ton of junk/illegitimate transactions to the network thereby consuming the necessary bandwidth and processing power for the network to deal with legitimate ones. If the transactions are invalid, then they would not be relayed by the network's nodes, making the attack somewhat ineffective. At best, the attacker could consume ...


2

No, it temporarily attenuates the issue, but doesn't resolve the problem. A spy miner gains less reward for an empty block than the large miner building on its own block. Currently, transaction fees make up about 11.7% of the block rewards (average over last week). As the subsidy decreases in the longer term, the transaction fees are expected to make up an ...


1

Attackers are financially disincentivized to do this. They have to produce enough transactions, frequently enough to fill up blocks and keep them full The transaction fee has to be large enough so they cause an actual clog instead of other users outbidding them with higher fees To keep the above two points going for any meaningful amount of time costs a ...


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