I have seen a few examples of people using linkedin to humble brag about their work ethic or whatever and all it ever does is tell me that they aren't actually happy with the thing they do.
I find it a lot more interesting to read or hear stories about projects people have been working on and them telling a little bit about the process. The excitement of them sharing what they have worked on is ten times more interesting than some randy bragging about how much they worked in one day.
Like omg congratulations. I work along hours too. I don't think it's anything to be proud of. Quite the contrary.