I did mention the spending may have had a part in the main article, but somehow I broke the link.
I don't know what the exact criteria was though, even the free iron man vrs drone set included with my purchase of a certain amount was listed as a freebie in the manifest thingy. This was not listed anywhere, and I would have tried contacting TLC to see if it was a mistake if not for discovering the flyer glued into the bottom of the box. For all I know my box just had enough room for it. Its a rather generous freebie, listed for $20 USD on S@H.