I'm in Asia at the moment so unsure if they ever sent anything to my house (I have my friends check the mailever week) but so far I doubt they did. I know they get my letter though because it was signed for. Either 3 options happened:
1.It got lost in the countless fan mail they gte. I know a good few people sent an Ork but I always said from the start that I doubt we would get anything back. It might be months before they even read the first one.
2.they're saving it for when they want to talk about Orks to push how much they love the community and how many people love Orks. Even if they over emphasise this it would be great publicity for them. I wouldn't even mind if they did it.
3. They read the letters and threw them in the bin because they hate Orks. This is very unlikely but having no response at all to the many people who sent it kinda feeds the already growing paranoia that they hate Orks to people who think that.