I think affiliate promoting bitcoin marketplaces/websites can be a easy way to make some bitcoins.
There are many ways to earn bitcoin you need have perseverance to achieved your goal, just set target things to provide by using bitcoin to motivate your self to work better in bitcoin. Just learn how to do trading it is much profitable than gambling while you are participating in signature campaign.
Signature campaign does not give great income if you are serious with making money, it's just a small reward and with the aim to make serious money you also have to do serious money making activities. I agree that trading is one of the best way to earn money and I can prove that as I am currently trading now and also investing in ICO which gives me a good experience so far.