It's important to find which chanell works for what. Reddit may be good for one kind of product, Forums for another, Quora can also drive tons of traffic, or it can fail miserably even though you're writing five high-quality answers per day. Regarding copywriting, social media isn't really a place people come to read news, they come to participate, so if you share copywriting content on social media 1) try to get some info if what you're writing about will be interesting on that particular platform; 2) try to engage people in the comments, try to light up a discussion and hey, you can link in comments too so win win.