Probably too late for the brand. The only thing now that could potentially reverse - or at least stay - the damage, is it f they publicly fire and disavow the actions of their CEO and chief marketing officer.
Perhaps. The sheep have memories that extend slightly further than your average dead goldfish, so this will be forgotten in a week.
What will really kill crack whore barrel is shit-tier food at high prices. No one can escape that.
It did work out for Coke. After they got rid of New Coke and brought back the original formula their sales had increased.