I believe that the case here is different. That would be true, say, for your substack page. But in this case, your "profile" is more than just a web page, it contains personal information, which albeit public, is your property according to the law. Therefore any interaction with it falls under article 15. Personally I would find it fantastic if LinkedIn is forced to make this feature available to all users. I can't see it but as a win for consumers and a loss for inducing payment through extraction of interrelational value.