It's not bad news, it's good news.
Most of those ads were for phishing sites, designed to steal people's log-ins for the exchanges. It gave noobs a bad impression that the crypto space was full of scams and crooks.
Same, i partially support Google in their move.
ICO scammy ads are popping everywhere and many people once seeing multiple ads tend to trust it and fall in this sometimes obvious scam.
Although, some well established companies shouldn't be affected by this ban, it should be more selective.