Sarc Mark

This is the newest form of punctuation and it is called the Sarc Mark. I'm not sure if it is actually endorsed for use in the English language but you can purchase this bad boy for just 2 bucks and use it anytime you feel the need to be sarcastic. It is true that English connotations can vary with tone and sarcasm is thoroughly hard to detect when being sent electronically, i.e. texting and emails, but,
Seriously?
Not only is a new punctuation mark a little crazy to me, but the fact that you have to pay for it to be installed on your computer is even worse.