VC funding and its significance in evaluating a product or service is a topic of some discussion here. Searching the forums should give you some examples - namely in relation to Skiff’s fallout, with arguments made that VC-funding should be a disqualifier for recommendations on PG. One reply highlights Brave specifically.
For Peter Thiel specifically, some have previously called for Brave’s removal based on this alone, though other considers his actual involvement and its implication minimal (as you’ll see in the replies).