This website seems particularly interesting for users working on a book (like SICP or K&R) or any other series of exercises (like ProjectEuler), especially if they're working on their own and would like feedback for the code they wrote.
I am often tempted to post each and every solution I write for these exercises, but before I do there are two points that prevent me from doing it:
I work on these exercises at a rate close to one solution a day. If the past 3 months are of any indication, I will have posted around 100 new questions by the end of the year. I understand that not all exercises are fit for the Q&A format of the website, but we're still talking about a high amount of questions.
In theory, I don't think that it's a bad thing to populate the website with more code to review, however general Web etiquette frowns upon anything that could be seen as spam. In doubt, I'd rather take your opinion before moving on.
I'm not going to be the only one working on SICP or Project Euler (or any other) and duplicate answers to the same exercise are bound to appear. I understand that reading existing questions before posting my own is common courtesy (and the tagging system seems to work well that way), but still that's not giving feedback on my particular piece of code, on the particular angle I'm interested in. Furthermore, as I progress in these tracks, exercises are becoming more difficult and possible solutions are getting more varied.
Generally speaking how are duplicate answers to similar exercises treated on this website?