It's because they have nothing else to say. They really don't know why these companies are valued the way they are aside from these buzzwords they keep hearing.

LinkedIn isn't a hypergrowth company. Every professional I know has a profile on it and so is every recruiter. Their stock is below its peak. They make a paltry income as a mature company. So, all that's left are magical buzzwords to make you think "something is brewing that will eventually make money." Nope. MSFT gets conned once again buying a trophy.