Due to the scam coins, they may be right to be afraid of publishing such deceiving ads but anyway, this news (including google,facebook etc.) affects the prices badly more than it should. The ads are banned,so? Are all the coins scam from now on?
For me, I don't think it would be a big problem if the twitter doesn't advertising cryptocurrency now. Yes, we are worried because there's a new loss for us. But we know that there are many social media accounts that can continue to advertising like the facebook and the youtube account. Also there are many user of it so i think it would be not a big problem