It is better if you are not going to rely with campaigns because they are not permanent. Just like what you have said, there are some that are staying longer than 6 months and there are some which are staying with fewer months. So since we don't know when they are going to stop, we should prepare and look for some other source like trading and investing into bankroll casino's if you do have a lot of bitcoins.
That is right. We have also to diversify our source of income, in this case the bitcoin. Me too are in trading and aside from that I am learning online for another skill which I can used to work online and accept bitcoin with it.Also I am joining the twitter campaign to have an additional bitcoin earning. Also, as part of diversification I am investing some of my earnings in real stocks though it is not in bitcoin but a good way to earn offline.