[jajko]

I only did it once (fb login for airbnb) and I deeply regret to this day. Airbnb cant even migrate my account to another type (plain old username & password is best for me).

The reason - over time I started renting an apartment there, the reputation and stream of guests is simply too big wall to climb over (I mean it can be done easily but it would hurt financially pretty bad).

Now I cant get rid of that cancer that facebook is. 10 years ago it didnt seems so, my mistake, should have seen it coming.