The claim that Brave is spyware is bogus; see
https://twitter.com/BraveSampson/status/1348400822925856770 for a point-by-point response. Best to get privacy and security insights from reliable, competent sources (e.g.
https://www.scss.tcd.ie/Doug.Leith/pubs/browser_privacy.pdf).
The issues mentioned by Tom Scott (from December of 2018) were wholly unrelated to security or privacy, and instead serve as a case-study in UI/UX and messaging. Allow me to explain a bit in greater detail.
Brave held a token sale in 2017 which resulted in 300 million BAT being added to a User Growth Pool. In 2018 we invited Brave users to direct BAT grants (that is, BAT belonging to Brave) to their favorite content creators. Some users expressed a desire to support Tom Scott (as they should; his content is phenomenal).
Brave's UI explicitly marked verified creators as such, but made no explicit indication when a creator was unverified (we followed a similar model to Twitter, which gives checkmarks only to verified accounts). This resulted in some confusion among our users about whether or not Tom was a verified creator.
Some users chose to direct BAT (again, from Brave's own User Growth Pool) to Tom's YouTube account. At the time, this BAT would migrate from the UGP through to a Settlement Wallet, waiting to be collected by the creator. Again, we're talking about BAT from Brave's own wallet--no user funds involved.
After listening to Tom's feedback over Twitter, Brave took action and made a series of prompt changes. For starters, we began to explicitly identify unverified creators as such (not doing so was a naïve design decision on our part). Secondly, we modified the contribution model such that Brave (the browser) would not send tips to any unverified creator (that is, no BAT would go into a settlement wallet). Instead, issued tips now remain in the user's control for up to 90 days while the browser routinely checks to see if the intended recipient has verified.
We blogged about these changes at the time: https://brave.com/rewards-update/. We made these changes in fewer than 48 hours, IIRC. Tom's feedback was excellent, and resulted in a substantially better tipping model in Brave. Of these changes, Tom shared on Twitter "These are good changes, and they fix the complaints I had!".
I hope this helps!
Sampson (Brave Team)