The rumor was that Ed Sheeran quit Twitter earlier this week. That is NOT true by any means. Basically what Ed is doing is refusing to read the responses that come through on his Twitter. He posts on his Instagram and because the 2 accounts are linked they automatically post on his Twitter. So, if you see something Ed posts on his Twitter and you @ him then there's a REALLY good chance Ed isn't going to see what you wrote.
There, now we cleared that up you can continue on with your day.