I don't see how I (or LinkedIn) is making you do anything? LinkedIn is a place I can post data. I choose to do so in an attempt to market my resume. I fully expect that the data I post on LinkedIn's server becomes and is the property of LinkedIn, and wish it was more effective at extracting value from it?

Because LinkedIn is less effective than I'd like, I support 3rd parties scraping the data I posted there, again on the hope that they'd be more successful at marketing that data, which I would benefit from as the data is my resume.