[0xbadc0de5]

You "earn" BAT by accepting ads via notification. You can then donate this to other sites/creators (at least in theory). I tried it and managed about $25 USD of BAT over the course of a year. The catch is that it's impossible to convert to anything useful. So it's basically just vaporware. I have since stopped that experiment.

[Kranar]

The conversion is useful for the advertiser, not the user. The user simply sells their BAT back to the advertiser.