yeah, I did that promo and picked up a bunch of cases last week. just paid the $.60 bottle deposit on each case.
They have had other promos that are very worthwhile too. Last year got amusement park tickets for something like 250 points each and sold them in pairs on ebay for $80-90.
They also have promos for bonus points when entering codes. Last month they had double points on caps so each one was worth 6 points. I usually save the caps and case codes for promos like that, making sure to enter at least one cap every month or so to make sure the points never expire
My 9 year old son collects the caps and we take turns entering them. When we sold the tickets we split the money.