Baga authorization site "Odnoklassniki.Ru" or how not to do

The site odnoklassniki.ru has an amazing system of authorization and use of sessions. For example, here you can read about the surprise of people following the link in a post (And in no case do not go yourself!): Dolboeb.livejournal.com/1076635.html?thread=39293851 # t39293851

And very interesting cookies that this site prescribes to you. Look - I personally did not like this garbage.

Interestingly - who makes such websites in general?