You answer:

Hey, what do you think? We have a pretty strong guy in our alliance (currently TC27) who asked me in private chat where he could get crystals without spending anything because he was 300 or so short for the Hero Roulette. That was about two weeks ago. He claims he plays for free, hasn't spent a cent, and so on. Today, he bragged about spending over 80,000 crystals on the Roulette.
Is it possible to accumulate that much in two weeks?