On Tuesday's edition of Tech Teardown, host Erin Kennedy and Motley Fool tech and telecom bureau chief dig through the biggest tech news of the week, from Facebook, Twitter, and BlackBerry.

Facebook's payments business has plateaued as a small portion of the company's revenue, growing ever smaller as the company's ads business leaves the payments business in the dust. But is all that about to change? Also, could one big competitor in the exploding message service business represent big trouble for WhatsApp, and jeopardize the $19 billion investment that Facebook made in the company?

Facebook isn't the only one making acquisitions however. Evan takes a look over at Twitter and two big acquisitions it has made recently, and tells investors how likely they are to move the needle for the newly public social media company. Then, a look at BlackBerry, and one surprising investment the company just made. Could this be BlackBerry's last shot?

Erin Kennedy has no position in any stocks mentioned. Evan Niu, CFA has the following options: short January 2015 $60 puts on Facebook and long January 2015 $35 puts on Facebook. The Motley Fool recommends Facebook, Google-Class C Shares, Google (A shares), and Twitter. The Motley Fool owns shares of Facebook, Google-Class C Shares, and Google (A shares). Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.