Brave records that data locally, none of it is actually sent to any servers. The only thing they know is an amount of money must go to the websites that your browser viewed. They don't record IP addresses or any personal data.

correct, brave is excluded

AFAIK, all tracking (in both Brave and Flattr) happens locally on your device.

Some level of tracking _is_ strictly necessary for a system like this, because otherwise there's no way for the system to know which sites to give your money to.

Your idea is going to be pretty much impossible to legally do in the US, where you need to have some idea of who your money is coming from to operate.

Well... If you can think of a solution, make it because there are lots of other people who also want this.

But without a 3rd party payment system, it seems like you're screwed.

some cryptocurrencies come to mind. unfortunately none has caught up