I read about Automatic Summarization in Medium from HN and got an idea for my second bot: posting summarizations on long Reddit posts. These are also know as TL;RDs on the internets.
I use the Python bindings for the Open Text Summarizer (OTS). This works by extracting the most important sentences in the text.
Since such a thing would only work on certain types of comments I verify that they are of sufficient length and only contain plain text (no lists, tables and others).
The results have been incredibly disappointing. The comments made are sometimes useful, but they have produced little interest.