abhi3, thanks for your question. While we will give this product away for free to HN users, we plan to monetize the technology behind this in near future.<p>One of the uses of our notification system is to notify users about certain keywords in the articles. Let&#x27;s say you study for GRE and you need to memorize 1000 words. Currently, you can study with flash cards but ideally you need to read New York Times, Washington Post, Nautilus, Economist to really see the words in sentences.<p>What if we could notify you when certain keywords appear in these articles? I bet you would love to keep track of these words and with notifications you will only read newest articles. I hope some people would pay for such usage.