TL;DR The increased volatility of its value and high transaction fees are no longer economically feasible.
https://steamcommunity.com/games/593110/announcements/detail/1464096684955433613
RIP
I have sad news to share that we lost another one of the greats, Charles P. Thacker has passed. While most may not know the name, most can respect his early contributions to the personal computer. The New York Times has an article about his life and his contributions to the technological field...