Besides some anomalous very short-lasting peaks (with a massive one in 2016) the overall trend seems to be largely stable ever since it reached a plateau in 2010.
16 years of a stable playerbase seems good and predictable to me. Whether you call it thriving or not can be a discussion, but the game certainly isn’t doing bad if we look at how largely flat the fat part of this line is for the right two-thirds of the graph after 2010.