This article would be very useful for newbies, but there are many ways described in this article not that useful. Anyway, i believe the best way to earn bitcoin are through trading and participating in bitcoin signature campaign.
Faucets,airdrops and bounties are not useful anymore,we just have to stick with bitcoin to earn bicoins without any capital or can be more profitable through trading it.
if you have trading skills, it's better to use time to manage it. now for the signature campaign it is less productive, unlike in 2017, where the rewards of the signature campaign are satisfying and also the distribution is fast