For future reference, as they're out of stock and I can't afford owt else now anyway, are Kratom World's Royal Green and Royal White actually "the strongest green and white strains you'll ever try"...?

Haha ofc no. You can sometimes even encounter a good batch at KUK’s, the other time it’s bunk, same with the other vendors. You just accept the rules of the game, and it unfortunately resembles Russian roulette at the moment.