The frustration around Unity's pricing changes is understandable, and it might indeed present an opportunity for Godot. Your slogan, "Don't wait for Unity but go for Godot," has a catchy ring to it!
When it comes to marketing Godot to Unity developers, an effective strategy could involve highlighting the benefits of Godot, such as its open-source nature and the absence of retroactive fees. Additionally, exploring strategies like international link building can help reach a wider audience and attract developers looking for alternatives.
Collaborating with like-minded developers and initiating ad campaigns could be a great way to spread the word.