As far as I know, there is no official statement yet from twitter if they will ban cryptocurrency ads. Those news are using big companies like twitter, FB and google to be related in cryptocurrency to create FUD. If you notice, there is no official statement yet like what is the exact date. I'm pretty sure that there are a ton of work to do on their end if they will do that. Besides, they are earning a lot from crypto ads. I'm pretty sure that they will not ban crypto ads but instead, they will start regulating it to avoid deception which is a way to get scam.
Before this action was taken on the Twitter platform, both Facebook and Google restricted financial advertising due to concerns that cryptocurrencies were suspected of illegal activities. Advertisements that are currently banned worldwide cover the first token distribution (ICO), tokens, and cryptocurrency wallets.