Brand New Group for frequent giveaways
https://steamcommunity.com/groups/whatthegamegroup
https://store.steampowered.com/curator/40640212/

Group members only giveaways @ 100 members started:
https://www.steamgifts.com/giveaway/PCB1W/remothered-broken-porcelain (ended)

Group members only giveaways @ 300 members started:
https://www.steamgifts.com/giveaway/uC9eI/grid

For Anime related giveaways:
https://steamcommunity.com/groups/discoveranime