me too, but I went back to the refer page and did it again and sure enough, $900. Called in and they put in request to match, but was told not guaranteed. I used the $750 link just this morning, figuring $750 plus 20k referral points would be better than applying using the new $900 link with no referral points.

edit: try changing the "21a" in address bar to "21n". That should change to the $900 link