Apparently yes!
According to CoinDesk https://www.coindesk.com/twitter-will-ban-crypto-ads-starting-tomorrow/
to cnn https://www.ccn.com/twitter-bans-cryptocurrency-ico-advertising-starting-today/
if you google it, you'll find other links.

I read somewhere here in the forum, that big platforms (adWords, Facebook and now Twitter) banning ICO ads
is good for the market, why?
Is it because we'll have less scam and fraudster ICO?