There are four criteria that you must meet to become a Twitch Affiliate. Firstly, you have to stream for at least 500 minutes in the last 30 days. Secondly, you must stream on at least seven days in the last 30 days. Thirdly, you must receive an average of three concurrent viewers per stream. Lastly, you must have grown your audience to 50 followers. Twitch will automatically invite you to become an Affiliate if you meet these four criteria.