If you are talking about LinkedIn, I don't know how universally they are considered a tech company. Is any company that does its core business on a website a tech company now, even if their innovations aren't tech? NY Times has some fancy tech, but you'd be hard pressed to consider them a tech company.
These days every company uses tech in some way. If the bar is "uses tech" then every company is a tech company and the category is meaningless. If you asked a layman to name tech companies, would Disney appear high in their list? What about Ford? Or Chevron? All those companies use tech and all those companies develop new tech. But I think most people would say media company, car company, and oil company. In my mind LinkedIn is close enough to a tech company that you convinced me. But I do think it's a spectrum and Netflix and Facebook are more tech than. LinkedIn. LinkedIn is a sleazy job board or recruiting company. I feel the same way about Craigslist (is that a tech company?) Was Gawker a tech compsny? How about Hertz? A lot of my tech friends used to work at Starbucks but I think most customers don't consider it a tech company.