It is commercial software and a license can already be bought and entered in TextMate → About → Registration. Some more info here http://macromates.com/license_policy
What conditions future releases will run under (without a license) is undecided. One idea I like is to only offer the built-in updater to licensed users, OTOH I dislike the thought of having people use old builds (when newer versions exist).
看来 Allan 给 Textmate 2 选择 GPLv3 许可 留后手啊!