How much do bitcoin poker sites cost?

As a cryptocurrency enthusiast and finance professional, I'm often asked about the costs associated with bitcoin poker sites. Could you elaborate on the various factors that determine the overall cost of operating such a platform? For instance, do they require significant upfront investments in infrastructure and technology? Are there recurring expenses like maintenance fees, transaction costs, or licensing requirements? Additionally, how do the costs compare to traditional poker sites that operate with fiat currencies? Understanding these details is crucial for potential investors and entrepreneurs interested in the growing field of bitcoin poker.