You'd have to compromise wikipedia in some way to get invisible text on its pages.

The one that was shown to work[1] was a niche answer to a specific question that programmers might ask. That site was controllable by the attackers in a way that wikipedia is not. Being a niche answer comes with automatic SEO, but for a smaller attack surface.

[1]: https://simonwillison.net/2025/Nov/25/google-antigravity-exf...