This breed of scams has been around for a very long time and is known as the advance fee fraud.
It has various names such as the Nigerian 419, Nigerian money offer, the Spanish prisoner etc.
These scammers are well aware of this and therefore often pretend to be from the USA/ UK/ Australia/ Canada or some other Western country.
The money could be cash, gold bullion, blood diamonds, gold dust, checks etc.
The sums usually run up to millions of dollars with the victim being promised a huge chunk of it for their "help".
This is a common ploy used by Russian and Filipino scammers to rob you off your money.
The general storyline is she will want to come visit you but does not have enough money and will ask you to send her money to help pay for the plane ticket and/or visa.
These are examples of some of the most notorious scams in the world of online dating and on the internet in general.