Lucky Stars Wheel for example. For a loooooooooooooong long time Jackpot has become the only valuable ninja. Aside power materials there is nothing valuable in it. Same goes for Lucky Board shop. Events which are both open for F2P and whales are condemned to look below average. Nothing good goes in their shops. Fuku deals are the haven for F2P low spenders. And fireworks is the last spark of hope for the past few years. Events really need a revision. But i doubt if it may happen anytime soon.