True there are some verifications required and probably some good amount of money but scammers who are so determined can do that. It probably shows you that they could be having more than enough money, probably scammed from elsewhere. Think about scammers making an investment 

Secondly, sparrow wallets left a void in the mobile phone space. They only have the app for the PC operating systems thus the scammers would easily create mobile versions and public them over there without quickly getting noticed... By the time the app is pinpointed, it's already too late. I don't this would be easy for them if there were offical