Signature campaign is the best for now to earn good bitcoin. Yes you can earn from faucets too if you really got many referals that help you earn too, if you didnt have any ref I dont think that is much worth to try so better doing campaign is far more better.
But not many people are willing to use faucets to earn Bitcoin. If you have a lot of referrals under you, then it is worth it else it is just a waste of time.