Update 1/16 - Adblock has informed BleepingComputer that its engineers fixed the problem and released ABP 3.22.1 and AB 5.17.1 on the Opera and Edge extension stores. The same versions are currently in review on the Mozilla and Chrome add-on stores, and should be made available soon.
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I don’t think it was a scam as such. I think people didn’t really understand their model. I haven’t stayed informed on it though so maybe there is more to know.
Depends on why they were saying it was a scam. It’s functional as a browser, so not a scam on the most basic level. It hasn’t always been as privacy-supporting as it claims (somewhere between Chrome and Firefox if all are carefully configured, it seems). Brave also has a dubious crypto rewards scheme baked in.