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Do note that this website is also used as a platform for advertising ICOs or other related projects since this is considered the biggest and most famous forum about cryptocurrencies. People would not waste the opportunity to exhaust the possible means of earning money.
If you really want to learn about cryptocurrencies, there are limitless ways as everything exists in the internet. Try watching videos or researching about articles on bitcoin. Not to mention, there are also related threads and a beginner's guide here in the forum. Just make sure that you visit the RIGHT category. Lastly, maximize the search button if you have any specific questions about the forum as a whole.