问HN：你是如何推广一个小项目的？
我有一个小项目，目标非常小众，希望能够接触到对此感兴趣的人群。传统的谷歌广告有效吗？我只希望能获得几百个用户，如何进行成本与收益的评估呢？
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I have a small project that is very niche and would like to reach people who would be into it. Do traditional google ads work? I would be happy with just a few hundred users, how do you do cost / benefit?