In terms of facebook's most recent valuation, you could argue that the idea was "0.1%", and execution the 99.9%, in line with the general HN agreement that "ide

In terms of facebook's most recent valuation, you could argue that the idea was "0.1%", and execution the 99.9%, in line with the general HN agreement that "ideas are nothing, execution is everything". (That is, of course, assuming that MZ owes them anything for the idea.)