I don't see any signature campaign that give 0.1btc per week, the maximum that I received so far is 0.052/week, but, it would be better if you also do trading to increase your earnings. If you have luck in gambling, why not. Many ways but I prefer joining sig campaign, trading and holding bitcoin. So far, that 3 steps I am doing during my bitcoin life and it gives me 0.1 btc/week or more.