Thank you for your reply, Eleonora. Pleased to e-meet you!
That is what I figured. We have to make all these online platforms work for us, but my feeling is that somehow we are only working to embellish them with our presence (CV, expertise, skills, etc) without getting anything out of it, and that is especially true when you are a paying member.
I can't say much of LinkedIn as I haven't even tried the 1-month tryout yet, but I did try another platform for 2 years without success. I mean, the only thing a got was a bunch of low-rate-fast-delivery proposals from questionable sources.
Well, let's wait to see if someone had a more positive experience.