https://www.vice.com/en_us/article/88gzxb/elon-musk-to-twitter-ceo

A few days after Elon Musk announced that his deal to buy Twitter is “on hold” because of concern about spam and bots on the platform, Twitter CEO Parag Agrawal tweeted a thread about how the company tries to fight spam. Musk immediately responded publicly: ?. 

The exchange follows tweets from Musk last week that took issue with the company's own estimate that spam accounts make up fewer than 5 percent of accounts on the platform. Besides nebulous allusions to "free speech," reigning in spam on Twitter has been one of Musk's main talking points regarding the planned acquisition.