As per this question's answers, Scratch 2.0 is no longer considered a "free" language. As per this question's accepted answer, non-free languages are allowed if marked as non-competing.
Scratch 2.0 used to be runnable on the Web through any browser with Adobe Flash. However, now that Scratch 3.0 has superseded Scratch 2.0, Scratch 2.0 is only runnable through the offline editor, which is only available for Windows and Mac OS, both of which are non-free operating systems.
Should cops-and-robbers cop answers in Scratch 2.0 retroactively be marked non-competitive?