As stated earlier in the discussion, Wizz Air’s pricing strategy is quite different to Ryanair with the former normally dropping prices on the last few seats to be sold. Wizz Air has recently become much more load factor aggressive.
I am not sure the KRK example above is representative of most of its network. In fact, Wizz Air faces far less direct (and even indirect) competition than Ryanair and EasyJet.
CEE incomes may be lower but they are increasing, with more potential for growth in propensity to travel than in traditional Western European markets. There may be a seasonal dimension to some of this travel, but the same can be said for many Ryanair/Easyjet operations in Spain, Portugal, Italy, Cyprus, etc,