MetaMask's position in the Web3 wallet space is actually somewhat similar to Nokia's situation—although it's no longer in the spotlight, its recognition as an essential infrastructure component remains. The interesting question is: does it really need to spend money on advertising? It seems unlikely. As an entry-level application within the Ethereum ecosystem, its natural traffic and user stickiness are already strong enough. But this also reflects a phenomenon: mature infrastructure products often grow through word of mouth and network effects rather than marketing budgets.