Monkey pak help

i just got $105 on a moneypak card so i could put it on my paypal account.. in order to put it onto my paypal, i have to enter my social security number. i think that this is incredibly stupid. since i do not want my social security number floating around the internet, i was wondering if there was a way that i could fake it. like use a generator or something. or if i could just use my money pak card on sites like newegg and amazon. any help is greatly appreciated. thanks