When you first release a product/feature, the people that are going to really use it are the "early adopter" crowd. Once they embrace it, then you can spend the capital to roll it out to the later adopters. I'd be willing to bet that Android has far fewer early adopters than iOS.
You do realize that these things cost real money, right? Costing money for meaningless, valueless endeavors makes a business's overhead go up. When the overhead goes up, it has to be cut in other ways, usually by cutting employees. Unfortunately, that's difficult in France, which is why he is complaining. It's not sociopathy, it's business.
That's actually an incorrect way to think about it. Actually, Dropbox is paying for the free accounts, in an attempt to convert people to paying accounts.
Dropbox is simply offering a product which is priced around where supply and demand meet. I'm sure if Dropbox believed that they could make more money by increasing or lowering the price, they would. By paying for Dropbox, you're not paying for the free tier, you're paying the price that you think Dropbox is worth. It just so happens that Dropbox can make a good profit at that price point, even with the cost of the free accounts.
I used to drink a couple cups of coffee a day, but felt jittery and then had some pretty intense lows that made it hard to focus and enjoy work. I replaced that with a couple cups of green or oolong tea a day and it's done wonders for me in terms of jitters and lows. No long do I feel like I'm going to jump out of my skin or like I just want to take a nap while trying to concentrate on what I'm doing.
I highly recommend trying some tea if this sounds familiar. Green and oolong tea have significantly less caffeine in them than coffee, and it's just as fun, if not more, picking out good teas as it is picking out good coffee.