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I think Brave is very different than eSteem Surfer... Brave works like any browser but with "normal" ads disabled. The ads shown are supported by the browser and give the users special token when viewed.

A STEEM Brave-like browser will offer that functionality but with STEEM as a token.

At least in theory... What do you think?

Brave uses tipping economy and steem slightly different than that. But in theory it might work...