I receive such PMs 2 - 3 times a month and by email it is frequent ...

I respond to one such email and that lady even send me her profile photo... she asked me to arrange her visa and send her money for her tickets and some for shopping ... LOL
I told her I am very poor and if she can send me money i will return her back once she comes to meet me in Doha ;-)
after that she never responded ...

These are gangs who operates from different countries just to trap people in different scams such as investment/ online purchase by special offer etc...

One should be very careful dealing anything online specially when it comes to money matter ...