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The moment I read "Marketing stuff" I had some doubts about what I just downloaded.

why did you download it then?

Because it looked interresting? I thought it was a pdf about the new marketing oppurtunities bitcoin could present. But it was mostly about how to implement it into existing techniques. But you know, when you download something from a random post on the internet and it says marketing stuff I start doubting my decisions.

it's fine though. at least you did not waste money on it :)