Sarah’s opinions on anything and everything are very relevant, because she’s considered one of the major contenders for ‘12 POTUS. Only Sarah’s official end to any run for ‘12 POTUS will, also, end her being under the microscope.
I'm talking about in terms of endorsements. She can't run a race for anyone she endorses. It's up to the candidate.
You'll also notice that many of Sarah's supporters spoke out against her decision to endorse McCain, which destroys the narrative that her supporters are sheep.