Like the triune. I didn't think they were gods, just extremely powerful wizards.
What is a god? Anything that someone claims to be a god. Jupiter is a god. I don't believe in him and I think the only real Jupiter in the cosmos is that big gaseous planet that is some distance from us. That doesn't prevent me from acknowledging Jupiter is a god. He is one, even if he doesn't exist and even if nobody believes in him anymore.
The Tribunal was made of three gods, because that's the status they held in Dunmer myths.
Really, that's all there is to it. If M'aiq starts worshiping the Soul Tomato, then the Soul Tomato is a god. This doesn't imply any special status for the Soul Tomato, nor does it grant it any power.
The whole "divine" thing is a lie. The elves think they were gods in the paste, but have fallen from this lofty state; while the humans believe in a clear distinction between mortals and gods. But the truth is, everyone is just a spirit. A spirit that is itself a shard of another spirit, itself a fragment of a larger one, and so on, until you go back to the original unfragmented consciousness. Each subpart is weaker than its "parent" so it's easy to think the parent is a god for you. Because what's the point of a god if it isn't more powerful than you? But in reality, it isn't powerful any longer because it is fragmented in sub-entities. That's why the Aedra sacrificed themselves to create the world, they split into the next subgradient.
Dwarves thought that this was undesirable and tried to merge all of themselves into one single being so as to undo subgradience and become a supergradient entity. It seems it didn't work very well for them, though.