Yeah I've always seen them as self serving. I rarely see many interactions with the comments, seems like a one way trasaction where the influencer benefits from all the comments and the community get very little from it
That tweet is not a typical post by an influencer of cryptocurrency, the general origin of the question is one which the source should be a newbie, typically those type of post are in our altcoins discussion board, in aspect of the benefits of influencers, some times in the comments section the advertise companies and they earn from YouTube videos, only very few of them care about the community they are heading.