In YouTube, when you subscribe to another user's YouTube channel, they receive an email that you subscribed to them that includes a link back to your channel. Since TubeAssist subscribes to over 100 channels per day, this means that over 3,000 people per month will get an email with a link back to your channel.

Many of these users will click to check our your channel, watch your videos, subscribe, etc. As the days go by, your views, subscribers, comments, etc. will keep going up. You aren't purchasing subscribers so you won't see 10,000 new subscribers over night, but unlike purchased subscribers, they are real people who will view and interact with your channel.