The Economist is a British publication, and in British English, "for ever" means without end, whereas "forever" means without pause.
I guess e40 doesn't have an editor any longer
There is a place in the Restaurant at the End of the Universe, where someone is momentarily legally dead for tax purposes, but I think Thiel would rather pay some taxes and stay alive without a pause :)
I guess then he wants both...
For ever is two words when used after a verb, according to The Economist style guide, page 81 in the tenth edition.