1. They should stop giving buff pots for all of these paid promotions. Not one should have them. That alone stops me from participating in these "events."
2. Remove support and craft items from boxes, but make them all available through normal hunting at a good rate. That includes dyes, star signs, artifact crytals, etc., etc. Stop making people pay for crap that should be available through routine XPing, you greedy bastards!
3. Increase the odds of winning the top awards by 1000% AND increase the number and variety of top rewards. This game has been around for 20 years and there are still people who don't have even +10 cloaks, boss jewels, or dragon weapons. Flood the market with them so that people can purchase at reasonable prices, play and compete. (Those items alone won't make anyone elite, but they are a step in the right direction.)