I would guess this is not just to protect user data from being scraped. LinkedIn earns a lot of money from users paying for recruitment services (as in get adva

I would guess this is not just to protect user data from being scraped. LinkedIn earns a lot of money from users paying for recruitment services (as in get advanced filters to search for candidates and to send them job proposals). This costs 4 figures per month. So the LinkedIn product management has a high value from learning which extensions people are using to substitute or enhance their paid services even if the extensions don't violate the ToS.