Is content publishing in BitTorrent altruistic or profit-driven?

@article{Rumn2010IsCP,
  title={Is content publishing in BitTorrent altruistic or profit-driven?},
  author={Rub{\'e}n Cuevas Rum{\'i}n and Michal Kryczka and {\'A}ngel Cuevas and Sebastian Kaune and Carmen Guerrero and Reza Rejaie},
  journal={Proceedings of the 6th International COnference},
  year={2010}
}
BitTorrent is the most popular P2P content delivery application where individual users share various type of content with tens of thousands of other users. The growing popularity of BitTorrent is primarily due to the availability of valuable content without any cost for the consumers. However, apart from required resources, publishing (sharing) valuable (and often copyrighted) content has serious legal implications for users who publish the material (or publishers). This raises a question that… 

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