I've redeemed 9 codes in the Topps Diamond Giveaway. The first 8 are somewhat in the "junk" category, although lots of people really want my 1972 Bob Oliver for some reason.
#9 gave me a hit on the Diamond Die Cuts.
I'm a little torn because I like CC, but probably not enough to keep a valuable (at the moment) card when I have the opportunity to make postage-free trades. My best offer currently is a 1960 Bobby Avila, which would become the 2nd oldest card in my 80s- and 90s-heavy collection. Hopefully someone will offer me a pile of cards for him, which I can then parlay into some more I really like.