I think Brave browser is a great way to promote NFTs through their displayed ads to users. I've discovered investment platforms, exchanges, NFTs for sale and games through Brave that I wouldn't have found so early through another ways. But keep in mind marketing must tell the truth to have legitimacy. I've also seen many deceitful marketing campaigns involving NFTs which frustrated enthusiasts in the end. So be selective and cautious with the NFTs you are going to promote. Due to so many negative experiences on this field, I'm very suspicious of any kind of marketing regards NFTs...