Does donkeymails sucks?

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Hi I just got registered with donkeymails. Does it a legit one? I am not clear about this donkeymails. Could you please let me know the areas of earning in donkeymails. After doing some research I came to know that the pays us for doing reviews and by signing up there and by clicking up ads. Is there any other areas where we can earn money in donkeymails? Onething that annoys me with donkeymail is that, even I done with the reviews and signup things even than my account was not credited. What do you think about this?