有 network effects 的公司不一定是互联网公司是吗?我是认为 telephone company 和互联网没什么关系所以没选。
答案的这句解释我也没太懂"The resume preparation service benefits from the network effects on various online job sites, but the service is not the source of those network effects.",这个服务不是用的人越多越有价值吗?根据 network effects 的定义,它为什么 least likely to have 呢?