Ah, complaining when people look at the painting in your store front gallery on 5th avenue because you have to pay for the upkeep of the sidewalk.
It's more like complaining about others selling tickets to view said painting from the sidewalk. HiQ repackages and sells data it scrapes from LinkedIn.
It's like taking pictures of the paintings from the street, and reselling those pictures.
If they don't like that... that the painting down. Simple.
https://en.wikipedia.org/wiki/Sui_generis_database_right
As with all rights, it varies with jurisdiction.
Personally I think anything I can see I should be able to take a photo of for sentimental purposes.
edit: didn't see the sibling reply which makes the same point