I've literally never seen this in my self-hosted Mattermost. Where do you see it?

I afraid I nuked my installation already. There were insignificant features, like for their Playbook (or what the name is), where you are offered some extra feature, that goes with the enterprise plan. If I chose my self-hosted instance for some reason, I don’t really need that advertising in my interface all the time. I can understand the reason it’s there, but I don’t like it still.

Not much of an issue. Did this get more annoying in the newest versions?

First time I tested a self-hosted instance was a couple of weeks back. It was their official testing docker container. So perhaps there are versions without that, I don’t know. I assume you should be able to compile this without them, or at least fork the original project. Hence, I’m asking what’s about those banners in real world scenario.