Can you get Amazon Prime for free for a month and then quickly log into Twitch and subscribe to your own Twitch channel?
I don't think that's possible. But why should you subscribe yourself. The few euro that jump out when possible are not worth it
You would have to create an additional account, which you then link to Amazon Prime, as you can't subscribe yourself. But it is possible with the extra account.
But of course you have to have the prerequisites to be able to offer Twitch subscriptions. If that is not the case, you can't offer yourself either. The 2-3 euro wouldn't be worth it anyway.
You definitely have to become an affiliate and for that you need an average of three viewers with an 8-hour stream running time.
You can't subscribe to your own channel. You would have to have a second Twitch account with which you can then subscribe to the other channel.
Of course, you have to be a Twitch Affiliate or Twitch Partner in order to subscribe to your channel.