Linkedin and Netflix are still considered startups?
Netflix was founded in the late 90s, so if you consider them a startup, then the term is pretty much meaningless.
This really puts your overall methodology in doubt.
I do think that's the case for Netflix, even though technically it was founded a while ago.
LinkedIn is a bit harder to defend as its business model seems to have stagnated.
With your definition, doesn't Amazon still qualify? It's majorly disrupting markets and rapidly evolving its business model. And it's definitely a tech company.