Why do big transactions have more impact? Do you mean big as in payload size? Like batch transactions, consolidations and coin joins?
Because big in sats doesn't affect the bottom line for miners, maybe for users who are eyeballing the network, but not for the rest of us, and not if the fork has a rule change with it.
Apologies for being unclear. I was reusing your term. Large holders have a correspondingly large impact on price movements. People look to price as the ultimate indicator of the success or failure of a fork. Antonopoulos is saying that institutional bitcoin investors will have the most say in which side of a contentious fork wins. He is correct.
