It depends om how you share the link. If you just promote your business, it probably would not be considered a quality link. But, if you provide helpful information and include a link to your website, then they share your post with their friends, and they share with their friends, and so on, even if it doesn't help your SEO, you could gain more traffic. Remember this - If you are doing it primarily for SEO purposes, don't do it. If you are doing it to because the reader would want to read it, and it just happens to help your SEO (or because it looks that way), go for it.