Event rewards...unlock for everyone pleasy

Hi,

The karts event is so cool but why dont you unlock all the items for everyone?

Im low level and i will have more disavantage against high levels because cant buy all the items of the event. Items that have a great relevance.

Let us buy them, not use if this is fine but I dont really understand why you block it. Why I cant buy a blue engraving? Anything has sense in that decision.

Regards and reconsider it please.