really useful reddit post -
https://www.reddit.com/search?q=title:updated_new_dota_2_giveaway_for_5000_active+selftext:all&sort=new

Dear player! Congratulations ! You won free giveaway DRAGONCLAW HOOK or in return you can choose another Dota 2 items. Get it on Probethub.com use your code: >H111BekNSO<- (This code can only use this Account)

Dear player! Congratulations ! You won free giveaway DRAGONCLAW HOOK or in return you can choose another Dota 2 items. Get it on Probethub.com use your code: >LFJ4KVJ<- (This code is valid only for this account.)