Ask HN: Downsides to using Reddit's source code?

I'm thinking about integrating a reddit/hackernews style of discussion forum into my website. However, I'm not a coder. I'm looking to hire someone with Python experience to mod reddit's source code. What are the downsides to basing my website's discussion forum on reddit's source code? I'm dealing with time constraints (I have about two months to get my site built out). This is a better idea than building from scratch, right?

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