The goal is to correct the conversation (versus messageboard oneupmanship or whatever). I wasn't previously aware of the details of the legal structure of USAA, but I didn't think it was a credit union and went and looked it up. I fear such comments are tiresome, but I guess it doesn't take very many readers seeing the right information for them to be worthwhile.
I think its always worthwhile to post correcting comments. My post you replied to was not sarcasm, for what its worth (I genuinely appreciated you correcting my mistake with factual information).
