Online meet could be an introduction , that can be advanced in reall relationship, depends on the seriousness of the parties.
I know some one who get introduced on internet one in Pakistan the other outside , they later on get married and are good couple.
Also , some times proper marriages wont work , which does not mean that this way is not recommended.
so , depends on the involved parties nature, may work or may end like with logging off.
However the Anonimity factor is a backbone in this type of Relationship, which makes confortable the parties in case they breakup.
well said..