Considering that as paid games, none of them have ads in them, I'm not sure what point you're trying to make since they can't meaningfully join in to a boycott of IronSource and Unity ads by virtue of not using them in the first place?
I updated the list. I’m sorry - Stardew Valley is not unity, and “Nintendo” wasn’t specific enough to referring to some of their Pokémon projects. (I also added everything after “Pokémon” in the list after this comment and they all use Unity.)
Nintendo has used Unity for certain titles. Off the top of my head I can think of the Pokemon Sinnoh remakes, Super Mario Run, I think the fire emblem mobile game too?
tell you when the (relatively speaking) peanut gallery joins in?
You may not have heard of them but each of these companies have a billion downloads in their portfolio minimum. This is massive that they all rejected this.
Tell me when the developers of Among Us, Pokemon, GRIS, Cuphead, Hollow Knight, Ori, Cities: Skylines, etc. join the letter.