Even offering that you like something helps. Responses depend on a wole pile of things - if your work has to be downloaded rather tham streamed I don't respond until I've watched & read. If your opening words are so or yeah etc I come back later. If I'm busy I don't even get on line. Reading, listening & offering opinion, comment, detail, suggestions establishes rapport with others and, totally apart from rep points, creates trust. Think of it as a bank - put in a little & it sits there, keep putting in & you get interest!!! Bank fees aside. I read, listened & responded for a few months before I posted. You also have to figure in time of day, day of the week, world events number of posts coming in and the ebb/flow of the more constant members of the forum.
There are OTHER forums. I happen to like the sense of community on this one.