Github shows self-promotion even on paid accounts.
unify.ui.com is not just any software. It's a hosted management interface. They are selling you a service on top of some hardware. Services self-promote.
At this point, I'm willing to argue the issue at hand isn't even about intrusive ads or whether SaaS should self-promote. This is likely a case of people's idea of ownership has been challenged. They thought they bought a physical good, they hold complete ownership of it, and they didn't tell the hardware to sell them things. What lots of people have failed to connect is, Ubiquity routers are hardware/software/service bundles. Specifically in this case, they are trying to sell you "powerful insights and control", AKA some analytics and remote management capabilities that's only available on specific hardware/unify combo. People don't have a problem with SaaS running on some cloud hardware self-promoting, so logically why should people have a problem with SaaS attached to some hardware that you can touch self-promoting. Well, it turns out people don't like that. It's too drastic a change, it upends our traditional understanding of what purchasing physical good means. People still think they bought a piece a hardware, they can move it around and open it up, and therefore they own everything related to it. It requires thinking to process that in fact, you've bought some hardware, but the service is just a license, and you don't own it. None of these reactions are rational, it's just human psychology.