According to Wiki, the game was started by EUL then the ALLSTARS version was created by Guinsoo before being passed on to ICEFROG.

The reason why S2 asked icefrog permission is because icefrog is the current designer and upgrader for the map. The other 2 don't count because they have "technically" retired and given up on the game and started their own projects. And yes, i will pay my USD 30. =)