I could not find the source message. Do they say who will sell tickets? Usual suspects are parter.ru and kassir.ru. But I have not found anything about it yet.
I found the source. They say that kassir.ru will sell tickets. There is no information on kassir.ru Well, I will go there on July 26 at 10 a.m. May be it's not a hoax and I manage to buy tickets.