Will I be able to sell my token in the future or are they completely destroyed after I bought the token and placed a bet?
Lucky Strike takes 5% of every bet and distributes it pro-rata among all token holders in the form of dividends. These will naturally, quickly exceed the ICO LST purchase price and continue to grow. You can then sell your LST on the exchange at a price always more than the ETH it accumulated.
I am sure that this description given by the team answers the question.