It's a weird middle-ground. I myself constantly ask people for their recommendations on books and such. I trust them and act upon their suggestions. The only difference is that influencers are paid to suggest, and sometimes this leads to low-quality products being touted by low-quality influencers appearing in your feed. Definitely bad.

DHH suggested a book in an interview with Tim Ferriss[0]. I read what DHH says often and trust his taste - is this bad? I don't think so. Obviously DHH wasn't paid to talk about this book, but it wouldn't matter either way to me; a lot of his influence comes from the fact that I know he wouldn't willingly shill for something he doesn't believe in.

[0] http://fourhourworkweek.com/2016/10/27/david-heinemeier-hans...