You can’t subscribe with Twitch Prime because you need to be a paid subscriber to Twitch to use Twitch Prime.
Twitch Prime is a monthly subscription service offered by Twitch.tv, which gives you access to exclusive in-game content and ad-free viewing on Twitch. The cost of the subscription is $8.99 per month, or $99 per year.
Twitch streamers receive a portion of the money from Prime subscriptions. They are paid based on how many hours they streamed on Twitch.
