it doesn't mean a whole lot because the reasons for the popularity are vague. for instance, there is a high participation % in pool, and there is a high % of family tables.....that's because pool is viewed as a game to pass the time, and has no significance to serious players or the pro game at all.
there is nothing more obvious than these stats vs. how the game is treated on tv,,,how the game/accessories are sold(next to the darts and gambling accessories),,,how many rooms continue to close,,,etc etc. participation may be and have been high for years, yet probably the only familiar name to those who "participate" is "the black widow" and i'll bet they don't even know the widow's real name.
it is a deceiving stat. there are two VERY different industries..one for the aficionado/pro,,,and one for the casual weekend/league/family den/bar player. the posted stat identifies the latter. everyone who posts at azb is of the former.