I used the same strategy by engaging with other folks' posts in an effort to gain visibility but also so that I could try to learn more about various authors.
The thing not to do is leaving ingratiating comments and/or commentary that amounts to shallow platitudes. Those really get on my frigging nerves!
That's why I placed a focus on leaving thoughtful comments in this piece rather than just a quick, groveling drive-by. Those just don't work and add nothing to the discussion like a real, well-thought-out comment does.