Twitter is working on limiting the number of DMs that non-verified users can send in one day

Even though the current limit is set at 500, Paluzzi speculated that the limit may be reduced once the feature is rolled out. — Reuters

Twitter is reportedly working on a feature to limit the number of direct messages or DMs that non-verified users can send in one day.

A screenshot of the feature in the works shows a pop-up message or a prompt asking the user to “Get verified to send more messages”.