Did you get your yam? In perhaps the oddest marketing gimmick in the history of SXSW, a company claiming to be “an online marketplace for yam enthusiasts and traders” -- yes, “Yamtrader.com” -- sent yams to media and press professionals in the run-up to this year’s event. Those lucky enough to receive the vegetables were instructed to redeem them for a $50 AmEx gift card in Austin. As AllThingsD reports, however, it was all a ruse orchestrated by cloud services company Tri-Net.