Famous tours (Plushenko, Tutberidze, Averbukh) have either skaters who cooperate with the organisers (even not very famous skaters) or active famous skaters from disciplines that the organisers lack.Unfortunately with the large number of titled skaters that Russia has i would guess skaters like Pogorilaya who didn't get any big titles or make a big splash that getting in some of the bigger/famous shows is probably a bit difficult
Pogorilaya was also unable to skate for a long time due to childbirth.
By the way, I just remembered that she recently performed on Averbukh's show that was dedicated to WW2.