I have been successfully promoting Twitch channels through my other "Web Traffic" gig (which you can check yourself) for a long time and even helped 3 channels get partnered, because of that, I decided to create this new gig, specifically for organic twitch channel promotion, be one of the first to use it for your advantage!
You can look at this service as a complement to your own networking, helping you reach a wider audience; or as a complete replacement, allowing you more time to focus on what's important: live streaming!
My marketing strategy is to visit your channel, define the target audiences based on your content and develop my work around it; then I will use my presence and well-established connections on Facebook, Instagram and Twitter to do publications on groups or pages (which ones will depend on your channel content) stimulating interest or curiosity and lead people to your channel or even better, your live stream, exposing them to you and your entertaining ability.
Due to the organic nature of this promotion service, it is a slow process growing your channel community, but you will definitely benefit in the long run!