I just got 15 subs from different users on twitch, but don't have an affiliate?

I just streamed and got 15 subs through advertising from colleagues. But I don't have an affiliate or anything else. How did they practice? Is that correct? Or is that just a mistake?

You will be able to see in your account management how many have subscribed to you and also what your other account status is.

Income on Twitch must be taxed. If you are clueless, at least that is.

It says nothing, but the subs were announced in the chat

And? Look in your account.

Who knows who writes what in the chat.