stuffs

-Sponsors (Youtubers etc, their videos will give traffic and then they can do giveaways with items funded.)
-Subreddits (/r/globaloffensive /r/dota2 etc, can just post there and hope for upvotes and hit front page, may give traffic)
-Streaming (Livestreaming a lot with links to site in info / chat, doing semi-regular giveaways maybe at the end of each stream. Can also advertise stream through site.)
-Advertising in person (meeting people within games and advertising to small amounts of people)