Depends on what you call a scam. I am not sure it's the right word, but duplicitous behavior and definite privacy violations (even if by negligence) are definitely true.

They have sent out direct mailers that basically equated to a customer list leak; also I'd take a peek at the wikipedia entry about their business model, which mentions some stuff that isn't the most savory:

... Brave earns revenue from ads by taking a 15% cut of publisher ads and a 30% cut of user ads. User ads are notification-style pop-ups, while publisher ads are viewed on or in association with publisher content.

On 6 June 2020, a Twitter user pointed out that Brave inserts affiliate referral codes when users navigate to Binance

In regards to the mailers, they messed up and passed blame,

In this process, our EDDM vendor made a significant mistake by not excluding names, but instead including names before addresses, resulting in the distribution of personalized mailers.

With regards to the CEO, he made a donation to an anti-LGBT cause when he was CEO of Mozilla in 2008. He lost his job at Mozilla due to his anti-LGBT stance.

He also spreads COVID misinformation.

OOL, what's up with firefox android's app?

That hasn't do anything with the results. You can test everything yourself. Techlore also made a interview with him.

It discloses that on the front page, below the test table. Anyway, the tests are open source and they check pretty common stuff. I can't see the problem there if Firefox comes out having actually worse defaults.

It is how it is, there isn't much more to say. As a matter of fact, Librewolf gets a lot more green ticks, same or more than Brave. Thus, I can hardly see bad faith on what the website does.

No, sorry. I have had endless arguments and discussion about this topic. I'm tired of talking about it. I'm just using a browser that works better than FF for me and I don't want to support Mozilla anymore (after 20 years). That's it.

I would like to see evidence for your claim that Firefox is more private.

Unsecure how exactly? Being chromium makes the browser more standard. It blends in with other browsers easier which means it can add protections while still showing itself as chromium compatible. I'd like to learn more about how chromium can just kill forks by updating the license, last I heard it was a BSD compatible one and I wasn't aware of it retroactively restricting access. Of course google can just fork and deprecate chromium with a more restrictive license given their the key copyright holders but as their project that isn't surprising. Firefox isn't interested in harvesting your data but that isn't security, it's privacy. Most chromium forks are the same. Brave doesn't harvest your data. It did once (and it can be argued you should avoid it just for that) but you seem to care less about which browser is best for your online privacy and more for just shilling firefox. For reference I use and love librewolf, but I like to consider myself open minded enough to try the other options... such as they are.