I`m coming across quite a few recommendations to different social sharing schemes - you share x posts and then you get so many credits to post your own material to the network in the hope that other people will share your content.
It this a legitimate way of getting your content "out there" and noticed - or is it likely that - now or in the future - people who use these schemes will be penalised in the same way that people who have used blog networks or links farms have been?