http://giveawayhopper.com/index.php
http://store.steampowered.com/app/554530/
сайт тупит
Список групп:
http://steamcommunity.com/groups/SGTTB
http://steamcommunity.com/groups/gifthopper
http://steamcommunity.com/groups/rexcurse
http://steamcommunity.com/groups/steadygiveaways
http://steamcommunity.com/groups/therexnetwork
http://steamcommunity.com/groups/storepromo
http://steamcommunity.com/groups/csgostone