So i heard a lot about these terms but confused exactly what these mean.  So basically if you own any btc or any altcoin, you could participate in these?  So basically it requires very little money or does it require no money at all for something like this.  I read about how ppl do certain things like post links on facebook and social media etc and then they get rewarded or something like that?  So basically you could do this for income or side income?