By not revealing their own identity and try to as private as possible.
Let's get the definition of influencer.
someone who affects or changes the way that other people behave:
There are many influencers in this forum and they never reveal their identity, although theymos likely have their IP address. Still, I don't know who're them, their face and so on.
o_e_l_e_o is one example of Bitcoin influencer, he taught me many thing about decentralization and non custodial, he influence me to use non custodial wallet in order to support decentralization.