There is so little advertising on discord that I find it hilarious you are so upset about a few notifications here and there about nitro and other aesthetic perks which are basically entirely optional
edit: grammar
To be fair, I put myself there and I voluntarily work with those audiences. I am aware I don't belong to the same level they do, and I'm ok with that. I just wish I could customize it my way too. In my view, if this was a protocol rather than a PaaS locked-in system, like IRC for example, we all would be winning.
I believe I am not alone with things like https://betterdiscord.app/ having more than 56M downloads (and that being just one of the custom mods)
1. Nitro Home 2. Shop 3. Quests
And hovering on users often brings up upsell.