I have added the proper HTML codes to my website for Twitter Cards. I have also applied for Twitter Cards and I recievd my approval e-mail confirmation this morning. I tested a link to an article and it works fine on the testing tool. However, when I tweet that same article link on Twitter, it does not show the “View Summary” option. Instead, it displays the expand option. I do not know why it is not working on the actual Twitter stream, but it IS working on the test tool. I recieved my confirmation e-mail too, as I stated before.