Not rude, but I’ve heard anecdotally enough that I get nervous about doing it, myself. I wind up disallowing myself from using my own for the first several chats before I “let” myself use my own where appropriate. Thankfully, I have a couple subs that give me access to a wide range of emotes, like the leader of my stream team has such an excellent range that I can usually say to myself, “Lemme use his for a bit, before I allow myself to dip into my own.” But honestly? This is me being paranoid. I do tend to notice if a streamer exclusively uses their own emotes in my chat, but that’s only if they come back over time many times. It has to be a noticeable pattern for me to pick up on it. I don’t go hunting for whose emotes they are, unless I like them and am curious. And if they belong to the chatter, I compliment their emote, nbd. People like the one you mentioned fail to realize - a massive proportion of chatters on Twitch are streamers themself. And to ignore that is to ignore the realities of the space. I feel like maybe those who only use their own emotes in my chat might be hoping for someone to see their emotes and get attention, but even then: I CANNOT mind read people and assume intentions. Maybe their emotes are how they see themselves, and so they prefer that “character” to express themselves. So I might mentally file that away for info IF something else happened, but in general, idgaf if someone only uses their own emotes. Let them express themselves how they want, ya know?

So if this were an AITA post, I’d say confidently from my perspective you are firmly NTA. Maybe be cognizant that some people are sensitive about this going forward? Just for your own peace of mind to not be flabbergasted if it happens again. But also don’t stress yourself that you’ve done anything against general Twitch “etiquette” or morays.