It also said that children were among those exploited for sums ranging from £50 to £800.
In a similar scheme, but usually not with the aim of blackmail, "catfishing" is where an online user is tricked by another who pretends to be someone they are not in order to befriend, fool or entice.
Don't communicate further with the criminals: Take screen shots of all your communication.
Suspend your Facebook account (but don’t delete it) and use the online reporting process to report the matter to Skype, You Tube etc.
Don't pay: Many victims who have paid have continued to get more demands for higher amounts of money.
In some cases, even when the demands have been met the offenders will still go on to post the explicit videos.
In the Philippines, the relatively new crime of 'webcam sex tourism' has been growing rapidly over the past few years.
Unfortunately, the Philippines has all the right factors to fuel the crime - good English speakers, increased Internet connections, widespread foreign money transfer systems, growing poverty and easy access to vulnerable children.
The term "sextortion" was a term coined by the National Police Chiefs' Council, which has been investigating the growing crime.
The NPCC said gangs were making millions from the scam, with thousands of victims too afraid to come forward.