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But I have a different opinion about marketing through social media. There are lots of campaigns here, where you can make some coins with that, but you need to have a lot of followers/friends. I for myself use Twitter and FB just to interact with my friends, and for that most people won't even get above 500 friends in their social media to be able to make anything out of it.
You can of course always create a fanpage or another Twitter account, and it is easy to get many followers/friends since there are lots of exchanges and services out there to accomplish that. But if you have a profile full of those followers, I think it is unlikely that an advertiser can profit much from that. So the only way you can make money with Social Media Marketing, is when you have something really of value, that attracts a lot of real followers, which is hard to build and once you reach it, you have much more worth than a few Satoshi imho. I just want to point out it is not so easy as well.
But I am also no expert in this. It is just my opinion so far. I'm always open to be convinced otherwise.