join some signature campaign , but 0.1 per week is hard i think
You can't earn 0.1 Bitcoin per week by way join some bounty campaign. As for as i see that if you are Hero / Legendary Member you can earn 0.02 bitcoin per week at the moment. Moreover, you also can earn 0.005 bitcoin per week if you have some social account with more than 10k followers. I think You can just earn 0.1 Bitcoin per week if you are an experience trader.