I don't think I agree with this claim. Also, they didn't cut-off anyone. You can still use their API as you wish. It's out there for anyone who wants it.
They simply stopped people from abusing a accessibility feature that they created for their own product.
>they didn't cut-off anyone
They did banned a lot people. Later, they "unbanned" them, but your comment isn't truthful.
I'm not seeing how "subsidized pricing for their own product" is accessibility related.