Treasure Chest from Watching Ads

I opened it after watching an ad. It was the Noble Treasure Chest from the Windy Hills. I got a 5000 EXP Potion. There's a 23% chance of getting nothing. I couldn't tell what I got because of an error, but checking my history showed I received a 5000 EXP Potion. Noble Treasure Chest from the Windy Hills Item Probability 1000 Coins 0.1% 5,000 Gems 1.5% 3,000 Gems 2% 5 Gem Booster: 1 Hour 2.4% 5 Gem Booster: 30 Minutes 3% 1,000 Gems 4% Gem Plus - 30 Minutes 6% 500 Gems 8% 10,000 EXP Up 20% 5,000 EXP Up 23% 3,000 EXP Up 30%