If you are old brave users well thats worth it. But if you are new that want to earn from ads you need to first buy the tokens to be able to verify the wallet .you need a minimum 25 bat tokens to verify it and to recieve rewards for having an ads.
No idea why they make this but its not good for those new to this program and have difficulty to understand block chain .
Brave has been doing many strange things lately. This is another one. The project was started to do many things differently. No spying, no hurdle to earn crypto, etc. All this is now gradually being put right. I do not understand the strategy of Brave behind it anymore. I used the browser as main browser on the desktop and mobile. I do not do that anymore.