With such type of promotion, you will be able to attract only a lot of bounty hunters, just hunting for free tokens and nothing more, they won't be interested in your project or your news.
Did you hear about Steem or Golos? These social networks work successfully in similar principles.
Steem and Golos aren't social networks, the are more like blogging platforms, and their princliples are not similar with Cryptoknowmics at all.