Generally there are 2 sides to every person. The personal side where you show only to friends and family. On the other hand, you have the professional side which will be displayed at work. While Facebook targets the personal side, LinkedIn targets the professional side.

Though I don't post anything on LinkedIn, I do read the feeds occasionally. Most posts are professional and business driven. There are targeted ads and I know they are mining my every click and activity data. However, I don't really mind these ads as I do find them relevant in my professional career.

The ads on LinkedIn are not as aggressive as those on Facebook. This is probably because LinkedIn has a premium version which requires users to pay. Being a paid user allows you to view any profile of your choice. Hence, the primary use case is for headhunters and companies' HR to identify potential candidates. Many companies also post job openings on LinkedIn and it is increasingly becoming the first place people will go to for jobs search (at least in Singapore).

Overall, LinkedIn is a place where I provide information that I don't mind sharing to the public. In fact, I might even want more attention from potential hirers so that I can get a better job.

Circling back to your question on whether it's a better platform for entrepreneurs. I think that's a yes. Compared to Steem, LinkedIn is meant for business professionals. Steem on the other hand is a mix of everything. Though LinkedIn is centralized, I see no harm in sharing things that you don't mind sharing. It's a pity you can't stop them from harvesting and monetizing your data, but I think the pros outweigh the cons. Perhaps when Steem grows to a certain scale, there will be an effective "tribe" created here to battle it out with LinkedIn