If you make sure they are not irrelevant, profile links are fine to use. They don't pass very much link juice, so don't expect them to move your rankings. However, they help you create a good anchor text profile (use your naked URL or site brand as the anchor text) and link profile generally.
Make sure you add enough text to make the page overall relevant to your website. In other words, write good, unique descriptions for each profile you create.
You may need to point other types of links at the profile pages to get them crawled and indexed.