How many of you have upgraded your clixsense account?

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Hi friends.I just wanted to know if upgrading my account in clixsense is worth the 10$ which is needed to invest in the beginning.I have 10$ in my paypal account right now which can be spent on anything that I want.What is your suggestion friends?Is upgradation in clixsense worth?Or can you suggest anything useful that I can do with this 10$.