Competition

So, a few months back Adidas ran almost 7 competitions on their app, I got a pop up message from the app that I won something, after a week I sent their team on Twitter a DM regarding it and I'm told "we haven't finalized the winners" but the only late competition was one for the Soweto Derby and people won so mine was before and still I haven't been contacted for my prize so, I don't know why Adidas does competitions just for footprint on their apps