https://www.cnet.com/news/kaspersky-calls-out-jack-dorsey-over-twitter-ad-ban/

Twitter vowed to stop Russian disinformation on the social network, and banned hundreds of puppet accounts and bots. Now, a Russian-based cybersecurity company is caught up in the conflict. 

Kaspersky Lab's founder Eugene Kaspersky wrote an open letter on Friday, calling out Twitter's CEO Jack Dorsey over an advertising ban on the social network. In the letter, Kaspersky revealed that Twitter banned Kaspersky Lab from advertising on its platform in February, telling the cybersecurity company that its business model "conflicts with acceptable Twitter ads."