I'm not saying that profile links can't be effective for ranking or that everyone using profile backlinks is shady.
One person isn't in order to be expert in all facets of search result optimization. Some SEO experts have lists of sites that accept automated link exchanges. http://m.17ll.com/apply/tourl/?url=https://Telegra.ph/Seo-Tips-Series---Solving-Problems-For-Fun-And-Profit-07-08