I don't want to defend anyone, but they didn't scam you. They sold you x amount of pps, nothing more, nothing less. If you will break even - that is completely in hands of current XPM difficulty, your luck and price of XPM at the moment (which has dropped 2x in last week).
In their thread in this forum, many people provided calculations, including me myself, and they clearly showed how much you will loose at this moment if you buy that service. They in other hand are promoting idea of mining and hoping that XPM value will rise, they sell only pps not specific amount of XPM you will earn.
By the way - eCoinomist guide with using DigitalOcean will also make you loose money, XPM difficulty is very high now and there are no virtual servers that can make you break even by mining it.
Note: the very idea that they are selling pps instead of using it to mine XPM by themselves makes you think about profitability, doesn't it?
+1
Sorry mate, but this is not a scam. They offered a fix amount of PPS and you got that.