To be fair, I would imagine that this event had some rule about not advertising in the chat in the ToS or stream rules fine print somewhere.
And as much as I dislike Steve and Reddit, I agree with Reddit on this one. You (or anyone else) shouldn't be abusing the chat of a competing service stream to advertise a different one. It is not the place for that and is rude. Please do not give existing Reddit users reason to believe all Lemmy users are rude rule breakers.
I am not complaining. I was there to make fun of Spez and I don't care if I was rude. If they think Lemmy users are any different than Reddit users they are delusional. There is all types of users here and there.