I don't see it.
Composio is a tool to help integration of LLM tool calling / MCPs. It really helped me streamline setting up some MCPs with Claude desktop.
I don't see how pushing Gemini would help their business beyond encouraging people to play with the latest and greatest models. There's a 1 sentence call-to-action at the end which is pretty tame for a company blog.
The examples don't even require you to use Composio - they're just talking about prompts fed to different models, not even focused on tool calling, MCPs, or the Composio platform.
I believe their point was that they are writing about what people want to read (a new AI breakthrough), possibly embellishing or cherry-picking results, although we can't prove/disprove it easily.
This approach yields more upvotes and views on their website, which ultimately leads to increased conversions for their tool.