You can't qualify for Mensa with the current SAT, they only accept it from before a certain yesr. Because back then no one got tutored and most people only took it once. Now it is gamed, with wealthier students more likely to win. So one of your reasons is non-existent. Excuse us for not being sympathetic to the tutoring industry, especially not from foreign countries where SAT cheating is rampant.
Some people take the test for a living for others, especially in foreign countries. Could be an attempt to block that, too. Those people must be frantic to get a feeling for the new test.
Here are the terms... They do state that they can cancel for pretty much any reason.