I bought something on TechSpot & shared my purchase on Facebook

Because whilst checking out, TechSpot, offered me $10 off the total cost if I shared my recent purchase to Facebook. Is this legit or a bogus claim by TechSpot and how do I get my $10 reduction?
 
Hey, this is how it works...

In order for someone to get their $10 referral credit, a new user must make a purchase of $10 or more through the shared link. The $10 would then be applied in store credit to that user's account, so they could apply it on their next purchase.
 
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