https://www.theregister.co.uk/2018/04/20/kaspersky_lab_loses_the_privilege_of_giving_twitter_money/

Twitter says it will no longer run ads from beleaguered security vendor Kaspersky Lab.

Claiming the company's alleged dealings with the Russian government violates its ad policies, the 280-character shoutfest site says Kaspersky's advertising money is no longer good, but it can still post regular (unpaid) Tweets.