I never gave them my address this time bc for 2 years I did, and never got anything from them. I think is more to pick and choose, who they'll send something, without having to spend too much money.
Although, I think they just want to know our business for whatever ulterior motive they have. They can keep their ''gifts'' most are just advertisement for this site, than a real token of appreciation for our volunteer work done in here. At least, that's all I got one time. A bag with viki logo, pencils with their logos and memo pads with their logo. Free advertisement as people saw them and asked me about them.