> I disagree with their stance that other open source license are not useful
There are two inaccuracies with this statement:
1) The FSF does not disapprove of the use of non-copyleft free licenses. They encourage the GPL, but as pointed out below, they themselves have both released code under other licenses and approved of the use of other licenses.
2) You seem to have missed gavinpc's point, which is that the FSF is the Free Software Foundation, not the "Open Source Software Foundation". They don't say that "other open source licenses" aren't useful, because they don't refer to their own licenses as "open source" licenses. They dislike the term "open source" and don't use it themselves.
