All the others tend to give up some of the aspects of Bitcoin. For example, being totally decentralized and having no central control. That's the first one they have to give up to try to have a business model.[/i]
I find it genuinely astounding how few people can be bothered to think this one through.
If you don't start off from this basis you don't ultimately have shit a vast amount of effort down the line. It's going to require some brutal object lessons until this necessity is wrapped enough around minds.