Based on some posts in the main Accelerate thread, it looks like the points now post with the regular points from your monthly credit card statement.
I don't know whether this would happen if the stay was charged but you haven't actually stayed yet. I might have been tempted to give it a go at the beginning of June, but think it's a bit risky to try now.
Is there nowhere else you can go which has nights for US$50 or so?