Cash Crate is a survey company, not a mystery shopping company. There have been folks that complain that even as a survey company they are more out to pick your pocket than to pay you for surveys.
Just remember the golden rules of avoiding scams: 1) If it looks too good to be true it probably is and 2) Never hand out your personal information by email unless you are at least 99.9% sure with whom you are interacting.
For mystery shopping the corollaries are: A) Mystery shopping does not pay you in advance of performing your work and
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Mystery shopping generally pays $5-$15 per shop and C) Mystery shopping does not 'send you work', you must request it or self-assign it.