All of the other providers in that list have their own APIs and plans too
OpenRouter is not remotely close to a representative source for inference distribution.
Considering probably 1 out of 1000 LLM users know what openrouter is, I don't know how much weight I'd put into it.
Intentional Gemini token consumption is likely very very small.
A poor model could require many more runs to solve a task, or much longer internal 'thinking' runs - all of which will increase token consumption but are a bad thing for the user.
OpenRouter is not a useful signal.