Facebook is reversing its advertisements ban on crypto currency and provide some preapproved advertisers to promote crypto currency businesses and services. But ICO ads are still banned.
In January 2018, Facebook banned all crypto ads on the service, around the height of the bitcoin price surge, to prevent people from promoting “financial products and services frequently associated with misleading or deceptive promotional practices.”
So now, ads which are approved by Facebook through an application process can promote crypto products and services, though advertisers promoting binary options and Initial Coin Offerings, are still banned.