Startup investing is not based on revenues, like it would be if you were investing in a part share of a restaurant or something like that. When a startup is valued at $10 million, it doesn't mean that the company, as is, is worth $10 million so much as that it has a 1% chance of one day being worth $1 billion.

The way you make money investing in startups is to make a lot of bets that each have a small chance of paying off big. So while I'm not saying anything about the specific companies you list (most of which I don't know anything about), a list of recent startup fundings should always include a lot (perhaps a majority) that investors will ultimately lose money on.

The problem is, you don't know which the winners will be. They usually tend to look very unpromising. If you'd made this list 5 years ago, it would have included a web site for college students, bizarrely thought to be worth tens of millions of dollars.