They have NOT done a good job in the US. Yes, they have signed up quite a few charities, but when I last looked (some time ago) from memory there was 1 charity (or none) that identified the ACU payment system on their website as a way to make donations. How basic a failure is that.
The US donations market is many multiples larger than Australian sports betting & it is where we need to continue - but with more astute marketing.