[happy14027]

I wonder how many sets were produced?

This is from Topps Dia Giveaway site

TOTAL APPROXIMATE RETAIL VALUE OF ALL PRIZES (INCLUDING DIGITAL RING COLLECTION PRIZES, AS PER RULE 3C ABOVE): $170,000 (USD)

If you subtract the ring prizes (60 x $200=$12,000) off of the $170,000 you get $158,000 divide that by the price per set of $50.00 you get 3160 sets--sounds really low to me.
BUT they say
*1,500,000 is based on consumer participation in similar "Giveaway" promotions previously offered by Topps. Actual quantity of prizes available to be won (or odds of winning, as applicable) cannot be more definitively stated as this depends on actual number of participants who input Codes.

so if you add the ring prizes (200) and the sets you get 3360 prizes yet there are 1,5000,000 prizes, they sure gave a lot of packs of cards away and they can't do any math because the total of packs, sets, die cuts and others should be around 1,499,800 prizes so I would guesstimate around 1 million sets!