I think a main gripe here is the tweet from xboxsupport acknowledging what happened and stating everyone would get to keep the points they received. Even though this can't really be seen as an official MS source, many people took this as confirmation and decided to save their points for something they really wanted instead of spending just for the sake of blowing the hot points before MS took them away. I guess if anything this was a learning experience. If this ever happens again (which it probably won't), everyone knows to just go on a spending frenzy.