This is probably a very location-dependent experience. I had literal stacks of spam mail every single mail day when I lived in Springfield and Kansas City, almost zero spam mail over entire years when I lived in smaller Missouri cities, and nowadays get maybe ~1-2 spam pamphlets per month at most here in Portland.
Probably based on a mix of local laws and/or how profitable each city is to market to.
Does it bother me? Not in the slightest. It's a community notice, and the Brave thing would only annoy me if it hit the levels that AOL CDs were at in the 90s.