I can't say I'm entirely disappointed to see LinkedIn doing poorly. They do shady things with their data[1], and I'm not okay with that.

I like the idea, but it feels like they are a company that could have done well and been fine privately, but market pressure forces them into some questionable practices (but I have no idea how representative of reality that is).

1: Such as determining a second email address of mine through data mining or some other method and sending emails to it asking if I know a person, even through I'm already linked with them, and that email address does not have a LinkedIn account. That's either an invasion of privacy, or spam, or both.